421870136 has 8 divisors (see below), whose sum is σ = 791006520. Its totient is φ = 210935064.

The previous prime is 421870093. The next prime is 421870151. The reversal of 421870136 is 631078124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26366876 + ... + 26366891.

It is an arithmetic number, because the mean of its divisors is an integer number (98875815).

Almost surely, 2^421870136 is an apocalyptic number.

It is an amenable number.

421870136 is a deficient number, since it is larger than the sum of its proper divisors (369136384).

421870136 is a wasteful number, since it uses less digits than its factorization.

421870136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52733773 (or 52733769 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 421870136 is about 20539.4775006571. The cubic root of 421870136 is about 749.9971176186.

The spelling of 421870136 in words is "four hundred twenty-one million, eight hundred seventy thousand, one hundred thirty-six".