25570525 has 6 divisors (see below), whose sum is σ = 31707482. Its totient is φ = 20456400.

The previous prime is 25570487. The next prime is 25570537. The reversal of 25570525 is 52507552.

It can be written as a sum of positive squares in 3 ways, for example, as 4235364 + 21335161 = 2058^2 + 4619^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25570525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511386 + ... + 511435.

Almost surely, 2^25570525 is an apocalyptic number.

25570525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25570525 is a deficient number, since it is larger than the sum of its proper divisors (6136957).

25570525 is a wasteful number, since it uses less digits than its factorization.

25570525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022831 (or 1022826 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 25570525 is about 5056.7306631855. The cubic root of 25570525 is about 294.6093651730.

Subtracting from 25570525 its product of nonzero digits (17500), we obtain a square (25553025 = 5055²).

The spelling of 25570525 in words is "twenty-five million, five hundred seventy thousand, five hundred twenty-five".