25465987 has 2 divisors, whose sum is σ = 25465988. Its totient is φ = 25465986.

The previous prime is 25465981. The next prime is 25466003. The reversal of 25465987 is 78956452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25465987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25465981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732993 + 12732994.

It is an arithmetic number, because the mean of its divisors is an integer number (12732994).

Almost surely, 2^25465987 is an apocalyptic number.

25465987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25465987 is an equidigital number, since it uses as much as digits as its factorization.

25465987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 25465987 is about 5046.3835565680. The cubic root of 25465987 is about 294.2073405903.

The spelling of 25465987 in words is "twenty-five million, four hundred sixty-five thousand, nine hundred eighty-seven".