421534506 has 16 divisors (see below), whose sum is σ = 843457248. Its totient is φ = 140446800.

The previous prime is 421534457. The next prime is 421534511. The reversal of 421534506 is 605435124.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 960 + ... + 29051.

It is an arithmetic number, because the mean of its divisors is an integer number (52716078).

Almost surely, 2^421534506 is an apocalyptic number.

421534506 is an abundant number, since it is smaller than the sum of its proper divisors (421922742).

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

421534506 is a wasteful number, since it uses less digits than its factorization.

421534506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32357.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 421534506 is about 20531.3055113405. The cubic root of 421534506 is about 749.7981714696.

The spelling of 421534506 in words is "four hundred twenty-one million, five hundred thirty-four thousand, five hundred six".