921426025 has 27 divisors (see below), whose sum is σ = 1239873861. Its totient is φ = 678980640.

The previous prime is 921426017. The next prime is 921426031. The reversal of 921426025 is 520624129.

The square root of 921426025 is 30355.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 237498921 + 683927104 = 15411^2 + 26152^2 .

It is not a de Polignac number, because 921426025 - 2³ = 921426017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1972842 + ... + 1973308.

Almost surely, 2^921426025 is an apocalyptic number.

921426025 is the 30355-th square number.

921426025 is the 15178-th centered octagonal number.

It is an amenable number.

921426025 is a deficient number, since it is larger than the sum of its proper divisors (318447836).

921426025 is an equidigital number, since it uses as much as digits as its factorization.

921426025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The cubic root of 921426025 is about 973.0910798425.

The spelling of 921426025 in words is "nine hundred twenty-one million, four hundred twenty-six thousand, twenty-five".