442131 has 4 divisors (see below), whose sum is σ = 589512. Its totient is φ = 294752.

The previous prime is 442121. The next prime is 442139. The reversal of 442131 is 131244.

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

It is a cyclic number.

It is not a de Polignac number, because 442131 - 2⁷ = 442003 is a prime.

It is a super-2 number, since 2×442131² = 390959642322, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 442131.

It is not an unprimeable number, because it can be changed into a prime (442139) 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, 73686 + ... + 73691.

It is an arithmetic number, because the mean of its divisors is an integer number (147378).

2⁴⁴²¹³¹ is an apocalyptic number.

442131 is a deficient number, since it is larger than the sum of its proper divisors (147381).

442131 is a wasteful number, since it uses less digits than its factorization.

442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147380.

The product of its digits is 96, while the sum is 15.

The square root of 442131 is about 664.9293195521. The cubic root of 442131 is about 76.1816407847.

Adding to 442131 its reverse (131244), we get a palindrome (573375).

The spelling of 442131 in words is "four hundred forty-two thousand, one hundred thirty-one".