421381610 has 16 divisors (see below), whose sum is σ = 816832296. Its totient is φ = 155587008.

The previous prime is 421381589. The next prime is 421381619. The reversal of 421381610 is 16183124.

It can be written as a sum of positive squares in 4 ways, for example, as 295874401 + 125507209 = 17201^2 + 11203^2 .

It is a super-2 number, since 2×421381610² = 355124922492384200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 421381610.

It is not an unprimeable number, because it can be changed into a prime (421381619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620569 + ... + 1620828.

Almost surely, 2^421381610 is an apocalyptic number.

421381610 is a deficient number, since it is larger than the sum of its proper divisors (395450686).

421381610 is a wasteful number, since it uses less digits than its factorization.

421381610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241417.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 421381610 is about 20527.5816890349. The cubic root of 421381610 is about 749.7075066858.

The spelling of 421381610 in words is "four hundred twenty-one million, three hundred eighty-one thousand, six hundred ten".