442091 has 8 divisors (see below), whose sum is σ = 491904. Its totient is φ = 394560.

The previous prime is 442069. The next prime is 442097. The reversal of 442091 is 190244.

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

It is a cyclic number.

It is not a de Polignac number, because 442091 - 2⁶ = 442027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (61488).

2⁴⁴²⁰⁹¹ is an apocalyptic number.

442091 is a deficient number, since it is larger than the sum of its proper divisors (49813).

442091 is a wasteful number, since it uses less digits than its factorization.

442091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 442091 is about 664.8992404869. The cubic root of 442091 is about 76.1793433076.

The spelling of 442091 in words is "four hundred forty-two thousand, ninety-one".