421342520 has 32 divisors (see below), whose sum is σ = 989241120. Its totient is φ = 161208960.

The previous prime is 421342517. The next prime is 421342531. The reversal of 421342520 is 25243124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228071 + ... + 229910.

It is an arithmetic number, because the mean of its divisors is an integer number (30913785).

Almost surely, 2^421342520 is an apocalyptic number.

421342520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421342520 is an abundant number, since it is smaller than the sum of its proper divisors (567898600).

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

421342520 is a wasteful number, since it uses less digits than its factorization.

421342520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458015 (or 458011 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421342520 is about 20526.6295333647. The cubic root of 421342520 is about 749.6843234460.

Adding to 421342520 its reverse (25243124), we get a palindrome (446585644).

The spelling of 421342520 in words is "four hundred twenty-one million, three hundred forty-two thousand, five hundred twenty".