1256323560 has 32 divisors (see below), whose sum is σ = 3768971040. Its totient is φ = 335019584.

The previous prime is 1256323559. The next prime is 1256323573. The reversal of 1256323560 is 653236521.

It is a super-2 number, since 2×1256323560² = 3156697774822147200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5234562 + ... + 5234801.

It is an arithmetic number, because the mean of its divisors is an integer number (117780345).

Almost surely, 2^1256323560 is an apocalyptic number.

1256323560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256323560 is an abundant number, since it is smaller than the sum of its proper divisors (2512647480).

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

1256323560 is a wasteful number, since it uses less digits than its factorization.

1256323560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10469377 (or 10469373 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 1256323560 is about 35444.6548861743. The cubic root of 1256323560 is about 1079.0307834124.

The spelling of 1256323560 in words is "one billion, two hundred fifty-six million, three hundred twenty-three thousand, five hundred sixty".