421560420 has 24 divisors (see below), whose sum is σ = 1180369344. Its totient is φ = 112416096.

The previous prime is 421560409. The next prime is 421560439. The reversal of 421560420 is 24065124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3512944 + ... + 3513063.

It is an arithmetic number, because the mean of its divisors is an integer number (49182056).

Almost surely, 2^421560420 is an apocalyptic number.

It is an amenable number.

421560420 is an abundant number, since it is smaller than the sum of its proper divisors (758808924).

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

421560420 is a wasteful number, since it uses less digits than its factorization.

421560420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026019 (or 7026017 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 421560420 is about 20531.9365866934. The cubic root of 421560420 is about 749.8135358676.

The spelling of 421560420 in words is "four hundred twenty-one million, five hundred sixty thousand, four hundred twenty".