420587 has 4 divisors (see below), whose sum is σ = 435120. Its totient is φ = 406056.

The previous prime is 420571. The next prime is 420593. The reversal of 420587 is 785024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420587 - 2⁴ = 420571 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420587.

It is not an unprimeable number, because it can be changed into a prime (420557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7223 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (108780).

2⁴²⁰⁵⁸⁷ is an apocalyptic number.

420587 is a deficient number, since it is larger than the sum of its proper divisors (14533).

420587 is a wasteful number, since it uses less digits than its factorization.

420587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 420587 is about 648.5267920449. The cubic root of 420587 is about 74.9235962668.

The spelling of 420587 in words is "four hundred twenty thousand, five hundred eighty-seven".