25653725 has 12 divisors (see below), whose sum is σ = 31956660. Its totient is φ = 20428800.

The previous prime is 25653721. The next prime is 25653739. The reversal of 25653725 is 52735652.

It can be written as a sum of positive squares in 6 ways, for example, as 1819801 + 23833924 = 1349^2 + 4882^2 .

It is not a de Polignac number, because 25653725 - 2² = 25653721 is a prime.

It is a super-2 number, since 2×25653725² = 1316227212751250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25653721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3485 + ... + 7965.

It is an arithmetic number, because the mean of its divisors is an integer number (2663055).

Almost surely, 2^25653725 is an apocalyptic number.

25653725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25653725 is a deficient number, since it is larger than the sum of its proper divisors (6302935).

25653725 is a wasteful number, since it uses less digits than its factorization.

25653725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4720 (or 4715 counting only the distinct ones).

The product of its digits is 63000, while the sum is 35.

The square root of 25653725 is about 5064.9506414179. The cubic root of 25653725 is about 294.9285472834.

The spelling of 25653725 in words is "twenty-five million, six hundred fifty-three thousand, seven hundred twenty-five".