442731 has 8 divisors (see below), whose sum is σ = 625104. Its totient is φ = 277760.

The previous prime is 442721. The next prime is 442733. The reversal of 442731 is 137244.

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

It is a cyclic number.

It is not a de Polignac number, because 442731 - 2⁵ = 442699 is a prime.

It is a super-2 number, since 2×442731² = 392021476722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442698 and 442707.

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 7 ways as a sum of consecutive naturals, for example, 4290 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (78138).

2⁴⁴²⁷³¹ is an apocalyptic number.

442731 is a deficient number, since it is larger than the sum of its proper divisors (182373).

442731 is a wasteful number, since it uses less digits than its factorization.

442731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701.

The product of its digits is 672, while the sum is 21.

The square root of 442731 is about 665.3803423607. The cubic root of 442731 is about 76.2160863249.

Adding to 442731 its reverse (137244), we get a palindrome (579975).

It can be divided in two parts, 44 and 2731, that added together give a triangular number (2775 = T₇₄).

The spelling of 442731 in words is "four hundred forty-two thousand, seven hundred thirty-one".