442291 has 2 divisors, whose sum is σ = 442292. Its totient is φ = 442290.

The previous prime is 442283. The next prime is 442319. The reversal of 442291 is 192244.

442291 = 269² + 270² + ... + 274².

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442291 - 2³ = 442283 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (442201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221145 + 221146.

It is an arithmetic number, because the mean of its divisors is an integer number (221146).

2⁴⁴²²⁹¹ is an apocalyptic number.

442291 is a deficient number, since it is larger than the sum of its proper divisors (1).

442291 is an equidigital number, since it uses as much as digits as its factorization.

442291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 442291 is about 665.0496222087. The cubic root of 442291 is about 76.1908293076.

Subtracting from 442291 its reverse (192244), we obtain a cube (250047 = 63³).

The spelling of 442291 in words is "four hundred forty-two thousand, two hundred ninety-one".