442502161 has 2 divisors, whose sum is σ = 442502162. Its totient is φ = 442502160.

The previous prime is 442502119. The next prime is 442502173. The reversal of 442502161 is 161205244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402243136 + 40259025 = 20056^2 + 6345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442502161 is a prime.

It is not a weakly prime, because it can be changed into another prime (442502861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221251080 + 221251081.

It is an arithmetic number, because the mean of its divisors is an integer number (221251081).

Almost surely, 2^442502161 is an apocalyptic number.

It is an amenable number.

442502161 is a deficient number, since it is larger than the sum of its proper divisors (1).

442502161 is an equidigital number, since it uses as much as digits as its factorization.

442502161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 442502161 is about 21035.7353329994. The cubic root of 442502161 is about 762.0295252669.

The spelling of 442502161 in words is "four hundred forty-two million, five hundred two thousand, one hundred sixty-one".