442631 has 8 divisors (see below), whose sum is σ = 519840. Its totient is φ = 368928.

The previous prime is 442619. The next prime is 442633. The reversal of 442631 is 136244.

It is a happy number.

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

It is not a de Polignac number, because 442631 - 2¹⁰ = 441607 is a prime.

It is a super-2 number, since 2×442631² = 391844404322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442633) 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, 596 + ... + 1113.

It is an arithmetic number, because the mean of its divisors is an integer number (64980).

2⁴⁴²⁶³¹ is an apocalyptic number.

442631 is a deficient number, since it is larger than the sum of its proper divisors (77209).

442631 is a wasteful number, since it uses less digits than its factorization.

442631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 576, while the sum is 20.

The square root of 442631 is about 665.3051931257. The cubic root of 442631 is about 76.2103475636.

Adding to 442631 its reverse (136244), we get a palindrome (578875).

The spelling of 442631 in words is "four hundred forty-two thousand, six hundred thirty-one".