442657 has 4 divisors (see below), whose sum is σ = 444820. Its totient is φ = 440496.

The previous prime is 442633. The next prime is 442691. The reversal of 442657 is 756244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 77841 = 604^2 + 279^2 .

It is a cyclic number.

It is not a de Polignac number, because 442657 - 2¹⁵ = 409889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (111205).

2⁴⁴²⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

442657 is a deficient number, since it is larger than the sum of its proper divisors (2163).

442657 is a wasteful number, since it uses less digits than its factorization.

442657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its digits is 6720, while the sum is 28.

The square root of 442657 is about 665.3247327433. The cubic root of 442657 is about 76.2118397247.

It can be divided in two parts, 44 and 2657, that added together give a triangular number (2701 = T₇₃).

The spelling of 442657 in words is "four hundred forty-two thousand, six hundred fifty-seven".