25451139 has 12 divisors (see below), whose sum is σ = 39475464. Its totient is φ = 14543424.

The previous prime is 25451123. The next prime is 25451177. The reversal of 25451139 is 93115452.

It is not a de Polignac number, because 25451139 - 2⁴ = 25451123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25451189) 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, 86422 + ... + 86715.

It is an arithmetic number, because the mean of its divisors is an integer number (3289622).

Almost surely, 2^25451139 is an apocalyptic number.

25451139 is a deficient number, since it is larger than the sum of its proper divisors (14024325).

25451139 is a wasteful number, since it uses less digits than its factorization.

25451139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173154 (or 173147 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 25451139 is about 5044.9121895232. The cubic root of 25451139 is about 294.1501500605.

The spelling of 25451139 in words is "twenty-five million, four hundred fifty-one thousand, one hundred thirty-nine".