421587 has 12 divisors (see below), whose sum is σ = 615160. Its totient is φ = 278208.

The previous prime is 421559. The next prime is 421607. The reversal of 421587 is 785124.

It is not a de Polignac number, because 421587 - 2⁷ = 421459 is a prime.

It is a Duffinian number.

421587 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 421587.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421587.

It is not an unprimeable number, because it can be changed into a prime (421517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1083 + ... + 1419.

2⁴²¹⁵⁸⁷ is an apocalyptic number.

421587 is a deficient number, since it is larger than the sum of its proper divisors (193573).

421587 is a wasteful number, since it uses less digits than its factorization.

421587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 479 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 421587 is about 649.2973124848. The cubic root of 421587 is about 74.9829294482.

The spelling of 421587 in words is "four hundred twenty-one thousand, five hundred eighty-seven".