25402131 has 12 divisors (see below), whose sum is σ = 38850552. Its totient is φ = 15938496.

The previous prime is 25402127. The next prime is 25402163. The reversal of 25402131 is 13120452.

It is not a de Polignac number, because 25402131 - 2² = 25402127 is a prime.

It is a super-2 number, since 2×25402131² = 1290536518682322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25402171) 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, 82861 + ... + 83166.

It is an arithmetic number, because the mean of its divisors is an integer number (3237546).

Almost surely, 2^25402131 is an apocalyptic number.

25402131 is a deficient number, since it is larger than the sum of its proper divisors (13448421).

25402131 is a wasteful number, since it uses less digits than its factorization.

25402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166050 (or 166047 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25402131 is about 5040.0526782961. The cubic root of 25402131 is about 293.9612263180.

Adding to 25402131 its reverse (13120452), we get a palindrome (38522583).

The spelling of 25402131 in words is "twenty-five million, four hundred two thousand, one hundred thirty-one".