1256938713 has 12 divisors (see below), whose sum is σ = 1816841520. Its totient is φ = 837376056.

The previous prime is 1256938699. The next prime is 1256938717. The reversal of 1256938713 is 3178396521.

1256938713 is a `hidden beast` number, since 1 + 2 + 569 + 3 + 87 + 1 + 3 = 666.

It is not a de Polignac number, because 1256938713 - 2⁸ = 1256938457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256938717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34731 + ... + 60992.

It is an arithmetic number, because the mean of its divisors is an integer number (151403460).

Almost surely, 2^1256938713 is an apocalyptic number.

It is an amenable number.

1256938713 is a deficient number, since it is larger than the sum of its proper divisors (559902807).

1256938713 is a wasteful number, since it uses less digits than its factorization.

1256938713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97188 (or 97185 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1256938713 is about 35453.3314795662. The cubic root of 1256938713 is about 1079.2068688140.

The spelling of 1256938713 in words is "one billion, two hundred fifty-six million, nine hundred thirty-eight thousand, seven hundred thirteen".