421564530 has 32 divisors (see below), whose sum is σ = 1012935744. Its totient is φ = 112286016.

The previous prime is 421564529. The next prime is 421564537. The reversal of 421564530 is 35465124.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (421564537) 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, 19464 + ... + 34956.

It is an arithmetic number, because the mean of its divisors is an integer number (31654242).

Almost surely, 2^421564530 is an apocalyptic number.

421564530 is an abundant number, since it is smaller than the sum of its proper divisors (591371214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421564530 is a wasteful number, since it uses less digits than its factorization.

421564530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16410.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 421564530 is about 20532.0366744266. The cubic root of 421564530 is about 749.8159726267.

The spelling of 421564530 in words is "four hundred twenty-one million, five hundred sixty-four thousand, five hundred thirty".