421420536 has 64 divisors (see below), whose sum is σ = 1221523200. Its totient is φ = 134364384.

The previous prime is 421420501. The next prime is 421420537. The reversal of 421420536 is 635024124.

421420536 is a `hidden beast` number, since 421 + 4 + 205 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421420537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37446 + ... + 47381.

It is an arithmetic number, because the mean of its divisors is an integer number (19086300).

Almost surely, 2^421420536 is an apocalyptic number.

421420536 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

421420536 is an abundant number, since it is smaller than the sum of its proper divisors (800102664).

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

421420536 is a wasteful number, since it uses less digits than its factorization.

421420536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84865 (or 84855 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 421420536 is about 20528.5298061016. The cubic root of 421420536 is about 749.7305912368.

The spelling of 421420536 in words is "four hundred twenty-one million, four hundred twenty thousand, five hundred thirty-six".