25656525 has 36 divisors (see below), whose sum is σ = 46449780. Its totient is φ = 13536000.

The previous prime is 25656487. The next prime is 25656541. The reversal of 25656525 is 52565652.

It can be written as a sum of positive squares in 6 ways, for example, as 224676 + 25431849 = 474^2 + 5043^2 .

It is not a de Polignac number, because 25656525 - 2⁹ = 25656013 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 25656525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22161 + ... + 23289.

Almost surely, 2^25656525 is an apocalyptic number.

25656525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25656525 is a deficient number, since it is larger than the sum of its proper divisors (20793255).

25656525 is a wasteful number, since it uses less digits than its factorization.

25656525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1238 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 25656525 is about 5065.2270432825. The cubic root of 25656525 is about 294.9392769778.

The spelling of 25656525 in words is "twenty-five million, six hundred fifty-six thousand, five hundred twenty-five".