421205986 has 8 divisors (see below), whose sum is σ = 632575440. Its totient is φ = 210347508.

The previous prime is 421205971. The next prime is 421206017. The reversal of 421205986 is 689502124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125676 + ... + 128983.

It is an arithmetic number, because the mean of its divisors is an integer number (79071930).

Almost surely, 2^421205986 is an apocalyptic number.

421205986 is a deficient number, since it is larger than the sum of its proper divisors (211369454).

421205986 is a wasteful number, since it uses less digits than its factorization.

421205986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255488.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 421205986 is about 20523.3034865248. The cubic root of 421205986 is about 749.6033375081.

The spelling of 421205986 in words is "four hundred twenty-one million, two hundred five thousand, nine hundred eighty-six".