442739 has 6 divisors (see below), whose sum is σ = 486780. Its totient is φ = 402380.

The previous prime is 442733. The next prime is 442747. The reversal of 442739 is 937244.

It is a de Polignac number, because none of the positive numbers 2^k-442739 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (442733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1709 + ... + 1950.

It is an arithmetic number, because the mean of its divisors is an integer number (81130).

2⁴⁴²⁷³⁹ is an apocalyptic number.

442739 is a deficient number, since it is larger than the sum of its proper divisors (44041).

442739 is a wasteful number, since it uses less digits than its factorization.

442739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681 (or 3670 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 442739 is about 665.3863539328. The cubic root of 442739 is about 76.2165453885.

The spelling of 442739 in words is "four hundred forty-two thousand, seven hundred thirty-nine".