421504544 has 24 divisors (see below), whose sum is σ = 839840400. Its totient is φ = 208211776.

The previous prime is 421504541. The next prime is 421504561. The reversal of 421504544 is 445405124.

It is a super-2 number, since 2×421504544² = 355332161225295872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421504541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76694 + ... + 82005.

It is an arithmetic number, because the mean of its divisors is an integer number (34993350).

Almost surely, 2^421504544 is an apocalyptic number.

It is an amenable number.

421504544 is a deficient number, since it is larger than the sum of its proper divisors (418335856).

421504544 is a wasteful number, since it uses less digits than its factorization.

421504544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158792 (or 158784 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 421504544 is about 20530.5758321582. The cubic root of 421504544 is about 749.7804062296.

Adding to 421504544 its reverse (445405124), we get a palindrome (866909668).

The spelling of 421504544 in words is "four hundred twenty-one million, five hundred four thousand, five hundred forty-four".