442857 has 8 divisors (see below), whose sum is σ = 604384. Its totient is φ = 288288.

The previous prime is 442843. The next prime is 442861. The reversal of 442857 is 758244.

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

It is not a de Polignac number, because 442857 - 2⁸ = 442601 is a prime.

It is a super-2 number, since 2×442857² = 392244644898, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (442807) 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, 1588 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (75548).

2⁴⁴²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

442857 is a deficient number, since it is larger than the sum of its proper divisors (161527).

442857 is a wasteful number, since it uses less digits than its factorization.

442857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479.

The product of its digits is 8960, while the sum is 30.

The square root of 442857 is about 665.4750183140. The cubic root of 442857 is about 76.2233159339.

The spelling of 442857 in words is "four hundred forty-two thousand, eight hundred fifty-seven".