442257 has 4 divisors (see below), whose sum is σ = 589680. Its totient is φ = 294836.

The previous prime is 442243. The next prime is 442271. The reversal of 442257 is 752244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (442243) and next prime (442271).

It is a cyclic number.

It is not a de Polignac number, because 442257 - 2⁶ = 442193 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442257.

It is not an unprimeable number, because it can be changed into a prime (442207) 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, 73707 + ... + 73712.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

2⁴⁴²²⁵⁷ is an apocalyptic number.

It is an amenable number.

442257 is a deficient number, since it is larger than the sum of its proper divisors (147423).

442257 is a wasteful number, since it uses less digits than its factorization.

442257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147422.

The product of its digits is 2240, while the sum is 24.

The square root of 442257 is about 665.0240597151. The cubic root of 442257 is about 76.1888769320.

The spelling of 442257 in words is "four hundred forty-two thousand, two hundred fifty-seven".