421685420 has 36 divisors (see below), whose sum is σ = 958905360. Its totient is φ = 155697984.

The previous prime is 421685419. The next prime is 421685443. The reversal of 421685420 is 24586124.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59000 + ... + 65759.

It is an arithmetic number, because the mean of its divisors is an integer number (26636260).

Almost surely, 2^421685420 is an apocalyptic number.

It is an amenable number.

421685420 is an abundant number, since it is smaller than the sum of its proper divisors (537219940).

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

421685420 is a wasteful number, since it uses less digits than its factorization.

421685420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124794 (or 124779 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 421685420 is about 20534.9803993089. The cubic root of 421685420 is about 749.8876394640.

The spelling of 421685420 in words is "four hundred twenty-one million, six hundred eighty-five thousand, four hundred twenty".