25235239 has 2 divisors, whose sum is σ = 25235240. Its totient is φ = 25235238.

The previous prime is 25235233. The next prime is 25235269. The reversal of 25235239 is 93253252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25235239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25235239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25235233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617619 + 12617620.

It is an arithmetic number, because the mean of its divisors is an integer number (12617620).

Almost surely, 2^25235239 is an apocalyptic number.

25235239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25235239 is an equidigital number, since it uses as much as digits as its factorization.

25235239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 25235239 is about 5023.4688214420. The cubic root of 25235239 is about 293.3160361988.

The spelling of 25235239 in words is "twenty-five million, two hundred thirty-five thousand, two hundred thirty-nine".