421398590 has 16 divisors (see below), whose sum is σ = 762905088. Its totient is φ = 167584416.

The previous prime is 421398557. The next prime is 421398641. The reversal of 421398590 is 95893124.

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 in 7 ways as a sum of consecutive naturals, for example, 120062 + ... + 123521.

It is an arithmetic number, because the mean of its divisors is an integer number (47681568).

Almost surely, 2^421398590 is an apocalyptic number.

421398590 is a deficient number, since it is larger than the sum of its proper divisors (341506498).

421398590 is a wasteful number, since it uses less digits than its factorization.

421398590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243763.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 421398590 is about 20527.9952747461. The cubic root of 421398590 is about 749.7175766257.

The spelling of 421398590 in words is "four hundred twenty-one million, three hundred ninety-eight thousand, five hundred ninety".