425390625 has 81 divisors (see below), whose sum is σ = 844237849. Its totient is φ = 206250000.

The previous prime is 425390611. The next prime is 425390627. The reversal of 425390625 is 526093524.

The square root of 425390625 is 20625.

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

425390625 is a `hidden beast` number, since 4 + 25 + 3 + 9 + 0 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 302446881 + 122943744 = 17391^2 + 11088^2 .

It is not a de Polignac number, because 425390625 - 2⁵ = 425390593 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 425390625.

It is not an unprimeable number, because it can be changed into a prime (425390627) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 38671870 + ... + 38671880.

Almost surely, 2^425390625 is an apocalyptic number.

425390625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

425390625 is the 20625-th square number.

425390625 is the 10313-rd centered octagonal number.

It is an amenable number.

425390625 is a deficient number, since it is larger than the sum of its proper divisors (418847224).

425390625 is an frugal number, since it uses more digits than its factorization.

425390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 19 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The cubic root of 425390625 is about 752.0775729402.

Multiplying 425390625 by its sum of digits (36), we get a square (15314062500 = 123750²).

The spelling of 425390625 in words is "four hundred twenty-five million, three hundred ninety thousand, six hundred twenty-five".