1252641256 has 16 divisors (see below), whose sum is σ = 2403324000. Its totient is φ = 611754864.

The previous prime is 1252641251. The next prime is 1252641317. The reversal of 1252641256 is 6521462521.

It is a super-2 number, since 2×1252641256² = 3138220232466515072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1252641251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820356 + ... + 1821043.

It is an arithmetic number, because the mean of its divisors is an integer number (150207750).

Almost surely, 2^1252641256 is an apocalyptic number.

It is an amenable number.

1252641256 is a deficient number, since it is larger than the sum of its proper divisors (1150682744).

1252641256 is a wasteful number, since it uses less digits than its factorization.

1252641256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641448 (or 3641444 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 1252641256 is about 35392.6723489482. The cubic root of 1252641256 is about 1077.9755330550.

The spelling of 1252641256 in words is "one billion, two hundred fifty-two million, six hundred forty-one thousand, two hundred fifty-six".