25620239 has 2 divisors, whose sum is σ = 25620240. Its totient is φ = 25620238.

The previous prime is 25620223. The next prime is 25620263. The reversal of 25620239 is 93202652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25620239 - 2⁴ = 25620223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25620209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810119 + 12810120.

It is an arithmetic number, because the mean of its divisors is an integer number (12810120).

Almost surely, 2^25620239 is an apocalyptic number.

25620239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25620239 is an equidigital number, since it uses as much as digits as its factorization.

25620239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25620239 is about 5061.6439029232. The cubic root of 25620239 is about 294.8001672591.

The spelling of 25620239 in words is "twenty-five million, six hundred twenty thousand, two hundred thirty-nine".