1265251502625 has 32 divisors (see below), whose sum is σ = 2296776553344. Its totient is φ = 613455272000.

The previous prime is 1265251502623. The next prime is 1265251502687. The reversal of 1265251502625 is 5262051525621.

It is a happy number.

It is not a de Polignac number, because 1265251502625 - 2¹ = 1265251502623 is a prime.

It is a super-2 number, since 2×1265251502625² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265251502623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153359694 + ... + 153367943.

It is an arithmetic number, because the mean of its divisors is an integer number (71774267292).

Almost surely, 2^{1265251502625} is an apocalyptic number.

1265251502625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265251502625 is a deficient number, since it is larger than the sum of its proper divisors (1031525050719).

1265251502625 is a wasteful number, since it uses less digits than its factorization.

1265251502625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306727666 (or 306727656 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 1265251502625 in words is "one trillion, two hundred sixty-five billion, two hundred fifty-one million, five hundred two thousand, six hundred twenty-five".