420087 has 8 divisors (see below), whose sum is σ = 593136. Its totient is φ = 263552.

The previous prime is 420073. The next prime is 420097. The reversal of 420087 is 780024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420087 - 2⁷ = 419959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4068 + ... + 4169.

It is an arithmetic number, because the mean of its divisors is an integer number (74142).

2⁴²⁰⁰⁸⁷ is an apocalyptic number.

420087 is a deficient number, since it is larger than the sum of its proper divisors (173049).

420087 is a wasteful number, since it uses less digits than its factorization.

420087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 420087 is about 648.1411883224. The cubic root of 420087 is about 74.8938944033.

The spelling of 420087 in words is "four hundred twenty thousand, eighty-seven".