421029681424 has 45 divisors (see below), whose sum is σ = 896706145111. Its totient is φ = 191364150560.

The previous prime is 421029681311. The next prime is 421029681427. The reversal of 421029681424 is 424186920124.

The square root of 421029681424 is 648868.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421029681427) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28542819 + ... + 28557565.

Almost surely, 2^421029681424 is an apocalyptic number.

421029681424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

421029681424 is the 648868-th square number.

It is an amenable number.

421029681424 is an abundant number, since it is smaller than the sum of its proper divisors (475676463687).

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

421029681424 is an frugal number, since it uses more digits than its factorization.

421029681424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29524 (or 14760 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 421029681424 in words is "four hundred twenty-one billion, twenty-nine million, six hundred eighty-one thousand, four hundred twenty-four".