1256675725 has 12 divisors (see below), whose sum is σ = 1626029856. Its totient is φ = 961629680.

The previous prime is 1256675681. The next prime is 1256675729. The reversal of 1256675725 is 5275766521.

It is not a de Polignac number, because 1256675725 - 2²⁵ = 1223121293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256675729) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1092187 + ... + 1093336.

It is an arithmetic number, because the mean of its divisors is an integer number (135502488).

Almost surely, 2^1256675725 is an apocalyptic number.

It is an amenable number.

1256675725 is a deficient number, since it is larger than the sum of its proper divisors (369354131).

1256675725 is a wasteful number, since it uses less digits than its factorization.

1256675725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185556 (or 2185551 counting only the distinct ones).

The product of its digits is 882000, while the sum is 46.

The square root of 1256675725 is about 35449.6223534187. The cubic root of 1256675725 is about 1079.1315964480.

The spelling of 1256675725 in words is "one billion, two hundred fifty-six million, six hundred seventy-five thousand, seven hundred twenty-five".