442724 has 6 divisors (see below), whose sum is σ = 774774. Its totient is φ = 221360.

The previous prime is 442721. The next prime is 442733. The reversal of 442724 is 427244.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 33124 = 640^2 + 182^2 .

It is an Ulam number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 442724.

It is not an unprimeable number, because it can be changed into a prime (442721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55337 + ... + 55344.

It is an arithmetic number, because the mean of its divisors is an integer number (129129).

2⁴⁴²⁷²⁴ is an apocalyptic number.

It is an amenable number.

442724 is a deficient number, since it is larger than the sum of its proper divisors (332050).

442724 is a wasteful number, since it uses less digits than its factorization.

442724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110685 (or 110683 counting only the distinct ones).

The product of its digits is 1792, while the sum is 23.

The square root of 442724 is about 665.3750821905. The cubic root of 442724 is about 76.2156846397.

Adding to 442724 its reverse (427244), we get a palindrome (869968).

The spelling of 442724 in words is "four hundred forty-two thousand, seven hundred twenty-four", and thus it is an iban number.