1205740 has 36 divisors (see below), whose sum is σ = 2688336. Its totient is φ = 454176.

The previous prime is 1205731. The next prime is 1205749. The reversal of 1205740 is 475021.

It is an interprime number because it is at equal distance from previous prime (1205731) and next prime (1205749).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1205749) 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 11 ways as a sum of consecutive naturals, for example, 7137 + ... + 7303.

It is an arithmetic number, because the mean of its divisors is an integer number (74676).

2^1205740 is an apocalyptic number.

1205740 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 1205740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344168).

1205740 is an abundant number, since it is smaller than the sum of its proper divisors (1482596).

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

1205740 is a wasteful number, since it uses less digits than its factorization.

1205740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1205740 is about 1098.0619290368. The cubic root of 1205740 is about 106.4350224844.

The spelling of 1205740 in words is "one million, two hundred five thousand, seven hundred forty".