25556459 has 2 divisors, whose sum is σ = 25556460. Its totient is φ = 25556458.

The previous prime is 25556437. The next prime is 25556507. The reversal of 25556459 is 95465552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25556459 - 2²⁰ = 24507883 is a prime.

It is not a weakly prime, because it can be changed into another prime (25556429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778229 + 12778230.

It is an arithmetic number, because the mean of its divisors is an integer number (12778230).

Almost surely, 2^25556459 is an apocalyptic number.

25556459 is a deficient number, since it is larger than the sum of its proper divisors (1).

25556459 is an equidigital number, since it uses as much as digits as its factorization.

25556459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 41.

The square root of 25556459 is about 5055.3396522885. The cubic root of 25556459 is about 294.5553350555. Note that the first 3 decimals are identical.

The spelling of 25556459 in words is "twenty-five million, five hundred fifty-six thousand, four hundred fifty-nine".