25140139 has 2 divisors, whose sum is σ = 25140140. Its totient is φ = 25140138.

The previous prime is 25140133. The next prime is 25140149. The reversal of 25140139 is 93104152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25140139 - 2⁹ = 25139627 is a prime.

It is not a weakly prime, because it can be changed into another prime (25140133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570069 + 12570070.

It is an arithmetic number, because the mean of its divisors is an integer number (12570070).

Almost surely, 2^25140139 is an apocalyptic number.

25140139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25140139 is an equidigital number, since it uses as much as digits as its factorization.

25140139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 25140139 is about 5013.9943159122. The cubic root of 25140139 is about 292.9471146692.

The spelling of 25140139 in words is "twenty-five million, one hundred forty thousand, one hundred thirty-nine".