25406587 has 2 divisors, whose sum is σ = 25406588. Its totient is φ = 25406586.

The previous prime is 25406573. The next prime is 25406597. The reversal of 25406587 is 78560452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25406587 is a prime.

It is not a weakly prime, because it can be changed into another prime (25406527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703293 + 12703294.

It is an arithmetic number, because the mean of its divisors is an integer number (12703294).

Almost surely, 2^25406587 is an apocalyptic number.

25406587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25406587 is an equidigital number, since it uses as much as digits as its factorization.

25406587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 25406587 is about 5040.4947177832. The cubic root of 25406587 is about 293.9784140445.

The spelling of 25406587 in words is "twenty-five million, four hundred six thousand, five hundred eighty-seven".