442109 has 2 divisors, whose sum is σ = 442110. Its totient is φ = 442108.

The previous prime is 442097. The next prime is 442121. The reversal of 442109 is 901244.

It is a balanced prime because it is at equal distance from previous prime (442097) and next prime (442121).

It can be written as a sum of positive squares in only one way, i.e., 386884 + 55225 = 622^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 442109 - 2¹⁶ = 376573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221054 + 221055.

It is an arithmetic number, because the mean of its divisors is an integer number (221055).

2⁴⁴²¹⁰⁹ is an apocalyptic number.

It is an amenable number.

442109 is a deficient number, since it is larger than the sum of its proper divisors (1).

442109 is an equidigital number, since it uses as much as digits as its factorization.

442109 is an odious number, because the sum of its binary digits is odd.

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

The square root of 442109 is about 664.9127762346. The cubic root of 442109 is about 76.1803771895.

The spelling of 442109 in words is "four hundred forty-two thousand, one hundred nine".