421390875 has 16 divisors (see below), whose sum is σ = 701195040. Its totient is φ = 224741600.

The previous prime is 421390859. The next prime is 421390877. The reversal of 421390875 is 578093124.

It is not a de Polignac number, because 421390875 - 2⁴ = 421390859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421390877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561480 + ... + 562229.

It is an arithmetic number, because the mean of its divisors is an integer number (43824690).

Almost surely, 2^421390875 is an apocalyptic number.

421390875 is a deficient number, since it is larger than the sum of its proper divisors (279804165).

421390875 is a wasteful number, since it uses less digits than its factorization.

421390875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123727 (or 1123717 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 421390875 is about 20527.8073597742. The cubic root of 421390875 is about 749.7130013008.

The spelling of 421390875 in words is "four hundred twenty-one million, three hundred ninety thousand, eight hundred seventy-five".