25290887 has 2 divisors, whose sum is σ = 25290888. Its totient is φ = 25290886.

The previous prime is 25290877. The next prime is 25290893. The reversal of 25290887 is 78809252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25290887 - 2²² = 21096583 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 (25290827) 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, 12645443 + 12645444.

It is an arithmetic number, because the mean of its divisors is an integer number (12645444).

Almost surely, 2^25290887 is an apocalyptic number.

25290887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25290887 is an equidigital number, since it uses as much as digits as its factorization.

25290887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 25290887 is about 5029.0045734718. The cubic root of 25290887 is about 293.5314818505.

The spelling of 25290887 in words is "twenty-five million, two hundred ninety thousand, eight hundred eighty-seven".