442561 has 8 divisors (see below), whose sum is σ = 535680. Its totient is φ = 356928.

The previous prime is 442537. The next prime is 442571. The reversal of 442561 is 165244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1741 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2⁴⁴²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

442561 is a deficient number, since it is larger than the sum of its proper divisors (93119).

442561 is a wasteful number, since it uses less digits than its factorization.

442561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its digits is 960, while the sum is 22.

The square root of 442561 is about 665.2525836102. The cubic root of 442561 is about 76.2063299165.

The spelling of 442561 in words is "four hundred forty-two thousand, five hundred sixty-one".