421747560 has 640 divisors, whose sum is σ = 1756339200. Its totient is φ = 89579520.

The previous prime is 421747549. The next prime is 421747567. The reversal of 421747560 is 65747124.

421747560 is a `hidden beast` number, since 4 + 21 + 74 + 7 + 560 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421747567) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 13604745 + ... + 13604775.

It is an arithmetic number, because the mean of its divisors is an integer number (2744280).

Almost surely, 2^421747560 is an apocalyptic number.

421747560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421747560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878169600).

421747560 is an abundant number, since it is smaller than the sum of its proper divisors (1334591640).

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

421747560 is a wasteful number, since it uses less digits than its factorization.

421747560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 421747560 is about 20536.4933715569. The cubic root of 421747560 is about 749.9244723944.

The spelling of 421747560 in words is "four hundred twenty-one million, seven hundred forty-seven thousand, five hundred sixty".