421867520 has 52 divisors (see below), whose sum is σ = 1012407600. Its totient is φ = 168738816.

The previous prime is 421867519. The next prime is 421867531. The reversal of 421867520 is 25768124.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10181 + ... + 30779.

Almost surely, 2^421867520 is an apocalyptic number.

421867520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421867520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506203800).

421867520 is an abundant number, since it is smaller than the sum of its proper divisors (590540080).

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

421867520 is an equidigital number, since it uses as much as digits as its factorization.

421867520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20628 (or 20606 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 421867520 is about 20539.4138183153. The cubic root of 421867520 is about 749.9955673812.

The spelling of 421867520 in words is "four hundred twenty-one million, eight hundred sixty-seven thousand, five hundred twenty".