25656025 has 12 divisors (see below), whose sum is σ = 31883004. Its totient is φ = 20480000.

The previous prime is 25656019. The next prime is 25656067. The reversal of 25656025 is 52065652.

It can be written as a sum of positive squares in 6 ways, for example, as 5053504 + 20602521 = 2248^2 + 4539^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25656025 is a prime.

It is a Duffinian 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, 15225 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (2656917).

Almost surely, 2^25656025 is an apocalyptic number.

25656025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25656025 is a deficient number, since it is larger than the sum of its proper divisors (6226979).

25656025 is a wasteful number, since it uses less digits than its factorization.

25656025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 25656025 is about 5065.1776869129. The cubic root of 25656025 is about 294.9373610182.

The spelling of 25656025 in words is "twenty-five million, six hundred fifty-six thousand, twenty-five".