421544156 has 36 divisors (see below), whose sum is σ = 813790824. Its totient is φ = 190919520.

The previous prime is 421544153. The next prime is 421544173. The reversal of 421544156 is 651445124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421544153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147170 + ... + 150006.

Almost surely, 2^421544156 is an apocalyptic number.

It is an amenable number.

421544156 is a deficient number, since it is larger than the sum of its proper divisors (392246668).

421544156 is a wasteful number, since it uses less digits than its factorization.

421544156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170 (or 3157 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 421544156 is about 20531.5405169705. The cubic root of 421544156 is about 749.8038930235.

The spelling of 421544156 in words is "four hundred twenty-one million, five hundred forty-four thousand, one hundred fifty-six".