25509925 has 12 divisors (see below), whose sum is σ = 36151456. Its totient is φ = 17492400.

The previous prime is 25509901. The next prime is 25509943. The reversal of 25509925 is 52990552.

It is not a de Polignac number, because 25509925 - 2⁵ = 25509893 is a prime.

It is a hoax number, since the sum of its digits (37) 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, 72711 + ... + 73060.

Almost surely, 2^25509925 is an apocalyptic number.

25509925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25509925 is a deficient number, since it is larger than the sum of its proper divisors (10641531).

25509925 is a wasteful number, since it uses less digits than its factorization.

25509925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145788 (or 145783 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 25509925 is about 5050.7350950134. The cubic root of 25509925 is about 294.3764479143.

The spelling of 25509925 in words is "twenty-five million, five hundred nine thousand, nine hundred twenty-five".