421321512 has 32 divisors (see below), whose sum is σ = 1089626400. Its totient is φ = 135597504.

The previous prime is 421321463. The next prime is 421321513. The reversal of 421321512 is 215123124.

It is a super-2 number, since 2×421321512² = 355023632947932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421321513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301978 + ... + 303369.

It is an arithmetic number, because the mean of its divisors is an integer number (34050825).

Almost surely, 2^421321512 is an apocalyptic number.

It is an amenable number.

421321512 is an abundant number, since it is smaller than the sum of its proper divisors (668304888).

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

421321512 is a wasteful number, since it uses less digits than its factorization.

421321512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605385 (or 605381 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 421321512 is about 20526.1178014743. The cubic root of 421321512 is about 749.6718635674.

Adding to 421321512 its reverse (215123124), we get a palindrome (636444636).

The spelling of 421321512 in words is "four hundred twenty-one million, three hundred twenty-one thousand, five hundred twelve".