421022144 has 28 divisors (see below), whose sum is σ = 836502264. Its totient is φ = 210249984.

The previous prime is 421022137. The next prime is 421022179. The reversal of 421022144 is 441220124.

It is a congruent number.

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, 54422 + ... + 61674.

Almost surely, 2^421022144 is an apocalyptic number.

It is an amenable number.

421022144 is a deficient number, since it is larger than the sum of its proper divisors (415480120).

421022144 is an equidigital number, since it uses as much as digits as its factorization.

421022144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8172 (or 8162 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 421022144 is about 20518.8241378496. The cubic root of 421022144 is about 749.4942629018.

Adding to 421022144 its reverse (441220124), we get a palindrome (862242268).

The spelling of 421022144 in words is "four hundred twenty-one million, twenty-two thousand, one hundred forty-four".