421330520 has 48 divisors (see below), whose sum is σ = 1026542160. Its totient is φ = 155565696.

The previous prime is 421330519. The next prime is 421330541. The reversal of 421330520 is 25033124.

It is a happy number.

421330520 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 421330492 and 421330501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24404 + ... + 37923.

It is an arithmetic number, because the mean of its divisors is an integer number (21386295).

Almost surely, 2^421330520 is an apocalyptic number.

421330520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421330520 is an abundant number, since it is smaller than the sum of its proper divisors (605211640).

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

421330520 is a wasteful number, since it uses less digits than its factorization.

421330520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62364 (or 62347 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 421330520 is about 20526.3372280590. The cubic root of 421330520 is about 749.6772062774.

Adding to 421330520 its reverse (25033124), we get a palindrome (446363644).

The spelling of 421330520 in words is "four hundred twenty-one million, three hundred thirty thousand, five hundred twenty".