442709 has 4 divisors (see below), whose sum is σ = 451116. Its totient is φ = 434304.

The previous prime is 442703. The next prime is 442721. The reversal of 442709 is 907244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 136900 = 553^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 442709 - 2¹⁶ = 377173 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442703) 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, 4124 + ... + 4229.

It is an arithmetic number, because the mean of its divisors is an integer number (112779).

2⁴⁴²⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

442709 is a deficient number, since it is larger than the sum of its proper divisors (8407).

442709 is an equidigital number, since it uses as much as digits as its factorization.

442709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 442709 is about 665.3638102572. The cubic root of 442709 is about 76.2148238716.

The spelling of 442709 in words is "four hundred forty-two thousand, seven hundred nine".