421515340 has 24 divisors (see below), whose sum is σ = 937252512. Its totient is φ = 158688000.

The previous prime is 421515337. The next prime is 421515371. The reversal of 421515340 is 43515124.

It is a happy 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, 619536 + ... + 620215.

It is an arithmetic number, because the mean of its divisors is an integer number (39052188).

Almost surely, 2^421515340 is an apocalyptic number.

It is an amenable number.

421515340 is an abundant number, since it is smaller than the sum of its proper divisors (515737172).

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

421515340 is a wasteful number, since it uses less digits than its factorization.

421515340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239777 (or 1239775 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 421515340 is about 20530.8387553943. The cubic root of 421515340 is about 749.7868075525.

The spelling of 421515340 in words is "four hundred twenty-one million, five hundred fifteen thousand, three hundred forty".