442645 has 8 divisors (see below), whose sum is σ = 607104. Its totient is φ = 303504.

The previous prime is 442633. The next prime is 442691. The reversal of 442645 is 546244.

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 442645 - 2⁷ = 442517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6289 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (75888).

2⁴⁴²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

442645 is a deficient number, since it is larger than the sum of its proper divisors (164459).

442645 is a wasteful number, since it uses less digits than its factorization.

442645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12659.

The product of its digits is 3840, while the sum is 25.

The square root of 442645 is about 665.3157145296. The cubic root of 442645 is about 76.2111510422.

Adding to 442645 its reverse (546244), we get a palindrome (988889).

The spelling of 442645 in words is "four hundred forty-two thousand, six hundred forty-five".