421543044 has 72 divisors (see below), whose sum is σ = 1207955840. Its totient is φ = 122876352.

The previous prime is 421543039. The next prime is 421543049. The reversal of 421543044 is 440345124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421543039) and next prime (421543049).

It is a junction number, because it is equal to n+sod(n) for n = 421542999 and 421543017.

It is not an unprimeable number, because it can be changed into a prime (421543049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14812 + ... + 32595.

Almost surely, 2^421543044 is an apocalyptic number.

It is an amenable number.

421543044 is an abundant number, since it is smaller than the sum of its proper divisors (786412796).

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

421543044 is a wasteful number, since it uses less digits than its factorization.

421543044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47449 (or 47444 counting only the distinct ones).

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

The square root of 421543044 is about 20531.5134366661. The cubic root of 421543044 is about 749.8032337152.

Adding to 421543044 its reverse (440345124), we get a palindrome (861888168).

The spelling of 421543044 in words is "four hundred twenty-one million, five hundred forty-three thousand, forty-four".