421245044520 has 32 divisors (see below), whose sum is σ = 1263735133920. Its totient is φ = 112332011840.

The previous prime is 421245044501. The next prime is 421245044527. The reversal of 421245044520 is 25440542124.

It is not an unprimeable number, because it can be changed into a prime (421245044527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755187566 + ... + 1755187805.

It is an arithmetic number, because the mean of its divisors is an integer number (39491722935).

Almost surely, 2^421245044520 is an apocalyptic number.

421245044520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421245044520 is an abundant number, since it is smaller than the sum of its proper divisors (842490089400).

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

421245044520 is a wasteful number, since it uses less digits than its factorization.

421245044520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510375385 (or 3510375381 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 33.

Adding to 421245044520 its reverse (25440542124), we get a palindrome (446685586644).

The spelling of 421245044520 in words is "four hundred twenty-one billion, two hundred forty-five million, forty-four thousand, five hundred twenty".