1256250625131 has 16 divisors (see below), whose sum is σ = 1788474099456. Its totient is φ = 782457414816.

The previous prime is 1256250625127. The next prime is 1256250625139. The reversal of 1256250625131 is 1315260526521.

It is not a de Polignac number, because 1256250625131 - 2² = 1256250625127 is a prime.

It is a super-2 number, since 2×1256250625131² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1256250625131.

It is not an unprimeable number, because it can be changed into a prime (1256250625139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211700880 + ... + 211706813.

It is an arithmetic number, because the mean of its divisors is an integer number (111779631216).

Almost surely, 2^{1256250625131} is an apocalyptic number.

1256250625131 is a deficient number, since it is larger than the sum of its proper divisors (532223474325).

1256250625131 is a wasteful number, since it uses less digits than its factorization.

1256250625131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423407762.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 1256250625131 in words is "one trillion, two hundred fifty-six billion, two hundred fifty million, six hundred twenty-five thousand, one hundred thirty-one".