25207139 has 2 divisors, whose sum is σ = 25207140. Its totient is φ = 25207138.

The previous prime is 25207097. The next prime is 25207157. The reversal of 25207139 is 93170252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25207139 - 2¹² = 25203043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25207439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12603569 + 12603570.

It is an arithmetic number, because the mean of its divisors is an integer number (12603570).

Almost surely, 2^25207139 is an apocalyptic number.

25207139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25207139 is an equidigital number, since it uses as much as digits as its factorization.

25207139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 25207139 is about 5020.6711702720. The cubic root of 25207139 is about 293.2071244532.

The spelling of 25207139 in words is "twenty-five million, two hundred seven thousand, one hundred thirty-nine".