25426555 has 32 divisors (see below), whose sum is σ = 38343168. Its totient is φ = 15724800.

The previous prime is 25426553. The next prime is 25426559. The reversal of 25426555 is 55562452.

25426555 = 210² + 211² + ... + 440².

It is not a de Polignac number, because 25426555 - 2¹ = 25426553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25426555.

It is not an unprimeable number, because it can be changed into a prime (25426553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81079 + ... + 81391.

It is an arithmetic number, because the mean of its divisors is an integer number (1198224).

Almost surely, 2^25426555 is an apocalyptic number.

25426555 is a deficient number, since it is larger than the sum of its proper divisors (12916613).

25426555 is a wasteful number, since it uses less digits than its factorization.

25426555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547.

The product of its digits is 60000, while the sum is 34.

The square root of 25426555 is about 5042.4750867010. The cubic root of 25426555 is about 294.0554101371.

The spelling of 25426555 in words is "twenty-five million, four hundred twenty-six thousand, five hundred fifty-five".