421255284 has 24 divisors (see below), whose sum is σ = 983279808. Its totient is φ = 140368320.

The previous prime is 421255273. The next prime is 421255319. The reversal of 421255284 is 482552124.

It is a congruent number.

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, 46624 + ... + 54920.

It is an arithmetic number, because the mean of its divisors is an integer number (40969992).

Almost surely, 2^421255284 is an apocalyptic number.

It is an amenable number.

421255284 is an abundant number, since it is smaller than the sum of its proper divisors (562024524).

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

421255284 is a wasteful number, since it uses less digits than its factorization.

421255284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535 (or 12533 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

The square root of 421255284 is about 20524.5044763570. The cubic root of 421255284 is about 749.6325809226.

The spelling of 421255284 in words is "four hundred twenty-one million, two hundred fifty-five thousand, two hundred eighty-four".