421310520 has 96 divisors (see below), whose sum is σ = 1374001200. Its totient is φ = 111960576.

The previous prime is 421310471. The next prime is 421310537. The reversal of 421310520 is 25013124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421310493 and 421310502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110811 + ... + 114549.

Almost surely, 2^421310520 is an apocalyptic number.

421310520 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 421310520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687000600).

421310520 is an abundant number, since it is smaller than the sum of its proper divisors (952690680).

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

421310520 is a wasteful number, since it uses less digits than its factorization.

421310520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 421310520 is about 20525.8500432991. The cubic root of 421310520 is about 749.6653440294.

Adding to 421310520 its reverse (25013124), we get a palindrome (446323644).

The spelling of 421310520 in words is "four hundred twenty-one million, three hundred ten thousand, five hundred twenty".