25139129 has 2 divisors, whose sum is σ = 25139130. Its totient is φ = 25139128.

The previous prime is 25139117. The next prime is 25139159. The reversal of 25139129 is 92193152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 139129 = 5000^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 25139129 - 2²⁰ = 24090553 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25139095 and 25139104.

It is not a weakly prime, because it can be changed into another prime (25139159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569564 + 12569565.

It is an arithmetic number, because the mean of its divisors is an integer number (12569565).

Almost surely, 2^25139129 is an apocalyptic number.

It is an amenable number.

25139129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25139129 is an equidigital number, since it uses as much as digits as its factorization.

25139129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 25139129 is about 5013.8935967968. The cubic root of 25139129 is about 292.9431915863.

It can be divided in two parts, 25 and 139129, that multiplied together give a square (3478225 = 1865²).

The spelling of 25139129 in words is "twenty-five million, one hundred thirty-nine thousand, one hundred twenty-nine".