421275625 has 15 divisors (see below), whose sum is σ = 527068003. Its totient is φ = 336610000.

The previous prime is 421275593. The next prime is 421275629. The reversal of 421275625 is 526572124.

The square root of 421275625 is 20525.

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

It can be written as a sum of positive squares in 7 ways, for example, as 392158809 + 29116816 = 19803^2 + 5396^2 .

It is not a de Polignac number, because 421275625 - 2⁵ = 421275593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421275629) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 512715 + ... + 513535.

Almost surely, 2^421275625 is an apocalyptic number.

421275625 is the 20525-th square number.

421275625 is the 10263-rd centered octagonal number.

It is an amenable number.

421275625 is a deficient number, since it is larger than the sum of its proper divisors (105792378).

421275625 is an frugal number, since it uses more digits than its factorization.

421275625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 826 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The cubic root of 421275625 is about 749.6446464732.

The spelling of 421275625 in words is "four hundred twenty-one million, two hundred seventy-five thousand, six hundred twenty-five".