421587504 has 240 divisors, whose sum is σ = 1390188800. Its totient is φ = 122611968.

The previous prime is 421587479. The next prime is 421587541. The reversal of 421587504 is 405785124.

421587504 is a `hidden beast` number, since 4 + 21 + 587 + 50 + 4 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960117 + ... + 960555.

Almost surely, 2^421587504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421587504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695094400).

421587504 is an abundant number, since it is smaller than the sum of its proper divisors (968601296).

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

421587504 is a wasteful number, since it uses less digits than its factorization.

421587504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 421587504 is about 20532.5961339525. The cubic root of 421587504 is about 749.8295932850.

It can be divided in two parts, 4215 and 87504, that added together give a palindrome (91719).

The spelling of 421587504 in words is "four hundred twenty-one million, five hundred eighty-seven thousand, five hundred four".