25802563 has 2 divisors, whose sum is σ = 25802564. Its totient is φ = 25802562.

The previous prime is 25802561. The next prime is 25802587. The reversal of 25802563 is 36520852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25802563 - 2¹ = 25802561 is a prime.

Together with 25802561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25802561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901281 + 12901282.

It is an arithmetic number, because the mean of its divisors is an integer number (12901282).

Almost surely, 2^25802563 is an apocalyptic number.

25802563 is a deficient number, since it is larger than the sum of its proper divisors (1).

25802563 is an equidigital number, since it uses as much as digits as its factorization.

25802563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 25802563 is about 5079.6223284807. The cubic root of 25802563 is about 295.4978207452.

The spelling of 25802563 in words is "twenty-five million, eight hundred two thousand, five hundred sixty-three".