421139656 has 16 divisors (see below), whose sum is σ = 902442240. Its totient is φ = 180488400.

The previous prime is 421139651. The next prime is 421139713. The reversal of 421139656 is 656931124.

It is not an unprimeable number, because it can be changed into a prime (421139651) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3760120 + ... + 3760231.

It is an arithmetic number, because the mean of its divisors is an integer number (56402640).

Almost surely, 2^421139656 is an apocalyptic number.

It is an amenable number.

421139656 is an abundant number, since it is smaller than the sum of its proper divisors (481302584).

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

421139656 is a wasteful number, since it uses less digits than its factorization.

421139656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7520364 (or 7520360 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 421139656 is about 20521.6874549828. The cubic root of 421139656 is about 749.5639871655.

The spelling of 421139656 in words is "four hundred twenty-one million, one hundred thirty-nine thousand, six hundred fifty-six".