442729 has 4 divisors (see below), whose sum is σ = 505984. Its totient is φ = 379476.

The previous prime is 442721. The next prime is 442733. The reversal of 442729 is 927244.

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 442729 - 2³ = 442721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442697 and 442706.

It is not an unprimeable number, because it can be changed into a prime (442721) 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, 31617 + ... + 31630.

It is an arithmetic number, because the mean of its divisors is an integer number (126496).

2⁴⁴²⁷²⁹ is an apocalyptic number.

It is an amenable number.

442729 is a deficient number, since it is larger than the sum of its proper divisors (63255).

442729 is an equidigital number, since it uses as much as digits as its factorization.

442729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63254.

The product of its digits is 4032, while the sum is 28.

The square root of 442729 is about 665.3788394591. The cubic root of 442729 is about 76.2159715581.

The spelling of 442729 in words is "four hundred forty-two thousand, seven hundred twenty-nine".