421290868 has 18 divisors (see below), whose sum is σ = 761815698. Its totient is φ = 203848560.

The previous prime is 421290851. The next prime is 421290869. The reversal of 421290868 is 868092124.

It can be written as a sum of positive squares in only one way, i.e., 421152484 + 138384 = 20522^2 + 372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421290868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421290869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50955 + ... + 58642.

Almost surely, 2^421290868 is an apocalyptic number.

It is an amenable number.

421290868 is a deficient number, since it is larger than the sum of its proper divisors (340524830).

421290868 is a wasteful number, since it uses less digits than its factorization.

421290868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109663 (or 109630 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 421290868 is about 20525.3713242903. The cubic root of 421290868 is about 749.6536878188.

The spelling of 421290868 in words is "four hundred twenty-one million, two hundred ninety thousand, eight hundred sixty-eight".