420164210 has 8 divisors (see below), whose sum is σ = 756295596. Its totient is φ = 168065680.

The previous prime is 420164203. The next prime is 420164221. The reversal of 420164210 is 12461024.

It can be written as a sum of positive squares in 2 ways, for example, as 417670969 + 2493241 = 20437^2 + 1579^2 .

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

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 21008201 + ... + 21008220.

Almost surely, 2^420164210 is an apocalyptic number.

420164210 is a deficient number, since it is larger than the sum of its proper divisors (336131386).

420164210 is a wasteful number, since it uses less digits than its factorization.

420164210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42016428.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 420164210 is about 20497.9074541769. The cubic root of 420164210 is about 748.9848250315.

The spelling of 420164210 in words is "four hundred twenty million, one hundred sixty-four thousand, two hundred ten".