25707239 has 2 divisors, whose sum is σ = 25707240. Its totient is φ = 25707238.

The previous prime is 25707211. The next prime is 25707301. The reversal of 25707239 is 93270752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25707239 - 2²⁰ = 24658663 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25707199 and 25707208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25707139) 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, 12853619 + 12853620.

It is an arithmetic number, because the mean of its divisors is an integer number (12853620).

Almost surely, 2^25707239 is an apocalyptic number.

25707239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25707239 is an equidigital number, since it uses as much as digits as its factorization.

25707239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 25707239 is about 5070.2306653642. The cubic root of 25707239 is about 295.1334797652.

The spelling of 25707239 in words is "twenty-five million, seven hundred seven thousand, two hundred thirty-nine".