421551156 has 48 divisors (see below), whose sum is σ = 1060714368. Its totient is φ = 129532800.

The previous prime is 421551149. The next prime is 421551173. The reversal of 421551156 is 651155124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159526 + ... + 162146.

It is an arithmetic number, because the mean of its divisors is an integer number (22098216).

Almost surely, 2^421551156 is an apocalyptic number.

It is an amenable number.

421551156 is an abundant number, since it is smaller than the sum of its proper divisors (639163212).

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

421551156 is a wasteful number, since it uses less digits than its factorization.

421551156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672 (or 3670 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 421551156 is about 20531.7109856924. The cubic root of 421551156 is about 749.8080433188.

The spelling of 421551156 in words is "four hundred twenty-one million, five hundred fifty-one thousand, one hundred fifty-six".