421573540 has 48 divisors (see below), whose sum is σ = 902563200. Its totient is φ = 165369600.

The previous prime is 421573519. The next prime is 421573553. The reversal of 421573540 is 45375124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289815 + ... + 291265.

It is an arithmetic number, because the mean of its divisors is an integer number (18803400).

Almost surely, 2^421573540 is an apocalyptic number.

It is an amenable number.

421573540 is an abundant number, since it is smaller than the sum of its proper divisors (480989660).

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

421573540 is a wasteful number, since it uses less digits than its factorization.

421573540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 421573540 is about 20532.2560864606. The cubic root of 421573540 is about 749.8213144691.

The spelling of 421573540 in words is "four hundred twenty-one million, five hundred seventy-three thousand, five hundred forty".