421232544 has 36 divisors (see below), whose sum is σ = 1197880866. Its totient is φ = 140410752.

The previous prime is 421232543. The next prime is 421232549. The reversal of 421232544 is 445232124.

421232544 is a `hidden beast` number, since 421 + 232 + 5 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 304851600 + 116380944 = 17460^2 + 10788^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×421232544² = 354873712249423872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421232543) 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, 731019 + ... + 731594.

Almost surely, 2^421232544 is an apocalyptic number.

It is an amenable number.

421232544 is an abundant number, since it is smaller than the sum of its proper divisors (776648322).

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

421232544 is a wasteful number, since it uses less digits than its factorization.

421232544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462629 (or 1462618 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 421232544 is about 20523.9504969194. The cubic root of 421232544 is about 749.6190919115.

Adding to 421232544 its reverse (445232124), we get a palindrome (866464668).

The spelling of 421232544 in words is "four hundred twenty-one million, two hundred thirty-two thousand, five hundred forty-four".