421250240 has 28 divisors (see below), whose sum is σ = 1003102896. Its totient is φ = 168499968.

The previous prime is 421250209. The next prime is 421250251. The reversal of 421250240 is 42052124.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657884 + ... + 658523.

Almost surely, 2^421250240 is an apocalyptic number.

421250240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421250240 is an abundant number, since it is smaller than the sum of its proper divisors (581852656).

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

421250240 is a wasteful number, since it uses less digits than its factorization.

421250240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316424 (or 1316414 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 421250240 is about 20524.3815984794. The cubic root of 421250240 is about 749.6295889428.

The spelling of 421250240 in words is "four hundred twenty-one million, two hundred fifty thousand, two hundred forty".