442815 has 16 divisors (see below), whose sum is σ = 723168. Its totient is φ = 231296.

The previous prime is 442807. The next prime is 442817. The reversal of 442815 is 518244.

It is a cyclic number.

It is not a de Polignac number, because 442815 - 2³ = 442807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (45198).

2⁴⁴²⁸¹⁵ is an apocalyptic number.

442815 is a deficient number, since it is larger than the sum of its proper divisors (280353).

442815 is a wasteful number, since it uses less digits than its factorization.

442815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618.

The product of its digits is 1280, while the sum is 24.

The square root of 442815 is about 665.4434611595. The cubic root of 442815 is about 76.2209062166.

The spelling of 442815 in words is "four hundred forty-two thousand, eight hundred fifteen".