1265500525 has 12 divisors (see below), whose sum is σ = 1569791764. Its totient is φ = 1012032000.

The previous prime is 1265500493. The next prime is 1265500531. The reversal of 1265500525 is 5250055621.

It can be written as a sum of positive squares in 6 ways, for example, as 22867524 + 1242633001 = 4782^2 + 35251^2 .

It is not a de Polignac number, because 1265500525 - 2⁵ = 1265500493 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76495 + ... + 91555.

Almost surely, 2^1265500525 is an apocalyptic number.

It is an amenable number.

1265500525 is a deficient number, since it is larger than the sum of its proper divisors (304291239).

1265500525 is a wasteful number, since it uses less digits than its factorization.

1265500525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18432 (or 18427 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1265500525 is about 35573.8741916030. The cubic root of 1265500525 is about 1081.6517150341.

The spelling of 1265500525 in words is "one billion, two hundred sixty-five million, five hundred thousand, five hundred twenty-five".