421200564 has 24 divisors (see below), whose sum is σ = 1025532480. Its totient is φ = 134295744.

The previous prime is 421200529. The next prime is 421200589. The reversal of 421200564 is 465002124.

It is a super-2 number, since 2×421200564² = 354819830227836192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762769 + ... + 763320.

It is an arithmetic number, because the mean of its divisors is an integer number (42730520).

Almost surely, 2^421200564 is an apocalyptic number.

It is an amenable number.

421200564 is an abundant number, since it is smaller than the sum of its proper divisors (604331916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421200564 is a wasteful number, since it uses less digits than its factorization.

421200564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526119 (or 1526117 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 421200564 is about 20523.1713923555. The cubic root of 421200564 is about 749.6001210559.

Adding to 421200564 its reverse (465002124), we get a palindrome (886202688).

The spelling of 421200564 in words is "four hundred twenty-one million, two hundred thousand, five hundred sixty-four".