25407131 has 2 divisors, whose sum is σ = 25407132. Its totient is φ = 25407130.

The previous prime is 25407127. The next prime is 25407169. The reversal of 25407131 is 13170452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25407131 - 2² = 25407127 is a prime.

It is a super-2 number, since 2×25407131² = 1291044611302322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25407097 and 25407106.

It is not a weakly prime, because it can be changed into another prime (25407181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703565 + 12703566.

It is an arithmetic number, because the mean of its divisors is an integer number (12703566).

Almost surely, 2^25407131 is an apocalyptic number.

25407131 is a deficient number, since it is larger than the sum of its proper divisors (1).

25407131 is an equidigital number, since it uses as much as digits as its factorization.

25407131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 25407131 is about 5040.5486804514. The cubic root of 25407131 is about 293.9805122289.

Adding to 25407131 its reverse (13170452), we get a palindrome (38577583).

The spelling of 25407131 in words is "twenty-five million, four hundred seven thousand, one hundred thirty-one".