161442041 has 2 divisors, whose sum is σ = 161442042. Its totient is φ = 161442040.

The previous prime is 161442011. The next prime is 161442049. The reversal of 161442041 is 140244161.

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., 116014441 + 45427600 = 10771^2 + 6740^2 .

It is an emirp because it is prime and its reverse (140244161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161442041 - 2¹⁰ = 161441017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161441998 and 161442016.

It is not a weakly prime, because it can be changed into another prime (161442049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80721020 + 80721021.

It is an arithmetic number, because the mean of its divisors is an integer number (80721021).

Almost surely, 2^161442041 is an apocalyptic number.

It is an amenable number.

161442041 is a deficient number, since it is larger than the sum of its proper divisors (1).

161442041 is an equidigital number, since it uses as much as digits as its factorization.

161442041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 161442041 is about 12705.9844561529. The cubic root of 161442041 is about 544.5096068504.

The spelling of 161442041 in words is "one hundred sixty-one million, four hundred forty-two thousand, forty-one".