421297320 has 32 divisors (see below), whose sum is σ = 1263892320. Its totient is φ = 112345920.

The previous prime is 421297313. The next prime is 421297321. The reversal of 421297320 is 23792124.

It is a super-3 number, since 3×421297320³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (421297321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755286 + ... + 1755525.

It is an arithmetic number, because the mean of its divisors is an integer number (39496635).

Almost surely, 2^421297320 is an apocalyptic number.

421297320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421297320 is an abundant number, since it is smaller than the sum of its proper divisors (842595000).

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

421297320 is a wasteful number, since it uses less digits than its factorization.

421297320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510825 (or 3510821 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 421297320 is about 20525.5284950230. The cubic root of 421297320 is about 749.6575147400.

The spelling of 421297320 in words is "four hundred twenty-one million, two hundred ninety-seven thousand, three hundred twenty".