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1269140 = 225233189
BaseRepresentation
bin100110101110110010100
32101110221012
410311312110
5311103030
643111352
713534055
oct4656624
92343835
101269140
11797584
12512558
13355892
1425072c
151a1095
hex135d94

1269140 has 48 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 464640.

The previous prime is 1269131. The next prime is 1269167. The reversal of 1269140 is 419621.

It is a happy number.

It is a super-2 number, since 2×12691402 = 3221432679200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14216 + ... + 14304.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

21269140 is an apocalyptic number.

1269140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1269140 is the 920-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1269140 is an abundant number, since it is smaller than the sum of its proper divisors (1633900).

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

1269140 is a wasteful number, since it uses less digits than its factorization.

1269140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1269140 is about 1126.5611390422. The cubic root of 1269140 is about 108.2687636262.

The spelling of 1269140 in words is "one million, two hundred sixty-nine thousand, one hundred forty".