442019 has 2 divisors, whose sum is σ = 442020. Its totient is φ = 442018.

The previous prime is 442009. The next prime is 442027. The reversal of 442019 is 910244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442019 - 2⁴ = 442003 is a prime.

It is a super-2 number, since 2×442019² = 390761592722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221009 + 221010.

It is an arithmetic number, because the mean of its divisors is an integer number (221010).

2⁴⁴²⁰¹⁹ is an apocalyptic number.

442019 is a deficient number, since it is larger than the sum of its proper divisors (1).

442019 is an equidigital number, since it uses as much as digits as its factorization.

442019 is an evil number, because the sum of its binary digits is even.

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

The square root of 442019 is about 664.8450947401. The cubic root of 442019 is about 76.1752074996.

The spelling of 442019 in words is "four hundred forty-two thousand, nineteen".