442669 has 4 divisors (see below), whose sum is σ = 449344. Its totient is φ = 435996.

The previous prime is 442633. The next prime is 442691. The reversal of 442669 is 966244.

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.

It is a cyclic number.

It is not a de Polignac number, because 442669 - 2⁹ = 442157 is a prime.

It is a super-2 number, since 2×442669² = 391911687122, which contains 22 as substring.

It is a Duffinian number.

442669 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 442669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442609) 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, 3237 + ... + 3370.

It is an arithmetic number, because the mean of its divisors is an integer number (112336).

2⁴⁴²⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

442669 is a deficient number, since it is larger than the sum of its proper divisors (6675).

442669 is an equidigital number, since it uses as much as digits as its factorization.

442669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its digits is 10368, while the sum is 31.

The square root of 442669 is about 665.3337508349. Note that the first 3 decimals coincide. The cubic root of 442669 is about 76.2125283947.

It can be divided in two parts, 442 and 669, that added together give a palindrome (1111).

The spelling of 442669 in words is "four hundred forty-two thousand, six hundred sixty-nine".