25725913 has 6 divisors (see below), whose sum is σ = 27328526. Its totient is φ = 24212352.

The previous prime is 25725907. The next prime is 25725961. The reversal of 25725913 is 31952752.

It can be written as a sum of positive squares in 3 ways, for example, as 8111104 + 17614809 = 2848^2 + 4197^2 .

It is not a de Polignac number, because 25725913 - 2⁵ = 25725881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25725013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44220 + ... + 44797.

Almost surely, 2^25725913 is an apocalyptic number.

It is an amenable number.

25725913 is a deficient number, since it is larger than the sum of its proper divisors (1602613).

25725913 is an equidigital number, since it uses as much as digits as its factorization.

25725913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89051 (or 89034 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 25725913 is about 5072.0718646328. The cubic root of 25725913 is about 295.2049251228.

The spelling of 25725913 in words is "twenty-five million, seven hundred twenty-five thousand, nine hundred thirteen".