25890559 has 6 divisors (see below), whose sum is σ = 27325320. Its totient is φ = 24527556.

The previous prime is 25890551. The next prime is 25890563. The reversal of 25890559 is 95509852.

It is not a de Polignac number, because 25890559 - 2³ = 25890551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35499 + ... + 36220.

It is an arithmetic number, because the mean of its divisors is an integer number (4554220).

Almost surely, 2^25890559 is an apocalyptic number.

25890559 is a deficient number, since it is larger than the sum of its proper divisors (1434761).

25890559 is an equidigital number, since it uses as much as digits as its factorization.

25890559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71757 (or 71738 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 25890559 is about 5088.2766237696. The cubic root of 25890559 is about 295.8333574732.

The spelling of 25890559 in words is "twenty-five million, eight hundred ninety thousand, five hundred fifty-nine".