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1240740 = 2232561113
BaseRepresentation
bin100101110111010100100
32100000222100
410232322210
5304200430
642332100
713355214
oct4567244
92300870
101240740
11778206
124ba030
13345987
14244244
15197960
hex12eea4

1240740 has 72 divisors (see below), whose sum is σ = 3859128. Its totient is φ = 322560.

The previous prime is 1240739. The next prime is 1240741. The reversal of 1240740 is 470421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240739) and next prime (1240741).

It can be written as a sum of positive squares in 4 ways, for example, as 112896 + 1127844 = 336^2 + 1062^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1240741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10924 + ... + 11036.

It is an arithmetic number, because the mean of its divisors is an integer number (53599).

21240740 is an apocalyptic number.

1240740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929564).

1240740 is an abundant number, since it is smaller than the sum of its proper divisors (2618388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240740 is a wasteful number, since it uses less digits than its factorization.

1240740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1240740 is about 1113.8850928170. The cubic root of 1240740 is about 107.4550740703.

The spelling of 1240740 in words is "one million, two hundred forty thousand, seven hundred forty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 61 90 113 122 180 183 226 244 305 339 366 452 549 565 610 678 732 915 1017 1098 1130 1220 1356 1695 1830 2034 2196 2260 2745 3390 3660 4068 5085 5490 6780 6893 10170 10980 13786 20340 20679 27572 34465 41358 62037 68930 82716 103395 124074 137860 206790 248148 310185 413580 620370 1240740