442613 has 4 divisors (see below), whose sum is σ = 444000. Its totient is φ = 441228.

The previous prime is 442609. The next prime is 442619. The reversal of 442613 is 316244.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 442613 - 2² = 442609 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (111000).

2⁴⁴²⁶¹³ is an apocalyptic number.

It is an amenable number.

442613 is a deficient number, since it is larger than the sum of its proper divisors (1387).

442613 is an equidigital number, since it uses as much as digits as its factorization.

442613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386.

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

The square root of 442613 is about 665.2916653619. The cubic root of 442613 is about 76.2093144948.

Adding to 442613 its reverse (316244), we get a palindrome (758857).

The spelling of 442613 in words is "four hundred forty-two thousand, six hundred thirteen".