421405612 has 48 divisors (see below), whose sum is σ = 788256000. Its totient is φ = 196789824.

The previous prime is 421405577. The next prime is 421405637. The reversal of 421405612 is 216504124.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458089 + ... + 459007.

It is an arithmetic number, because the mean of its divisors is an integer number (16422000).

Almost surely, 2^421405612 is an apocalyptic number.

It is an amenable number.

421405612 is a deficient number, since it is larger than the sum of its proper divisors (366850388).

421405612 is a wasteful number, since it uses less digits than its factorization.

421405612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 421405612 is about 20528.1663087573. The cubic root of 421405612 is about 749.7217409234.

Adding to 421405612 its reverse (216504124), we get a palindrome (637909736).

The spelling of 421405612 in words is "four hundred twenty-one million, four hundred five thousand, six hundred twelve".