161242049 has 2 divisors, whose sum is σ = 161242050. Its totient is φ = 161242048.

The previous prime is 161242021. The next prime is 161242063. The reversal of 161242049 is 940242161.

161242049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84364225 + 76877824 = 9185^2 + 8768^2 .

It is a cyclic number.

It is not a de Polignac number, because 161242049 - 2⁸ = 161241793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161242069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80621024 + 80621025.

It is an arithmetic number, because the mean of its divisors is an integer number (80621025).

Almost surely, 2^161242049 is an apocalyptic number.

It is an amenable number.

161242049 is a deficient number, since it is larger than the sum of its proper divisors (1).

161242049 is an equidigital number, since it uses as much as digits as its factorization.

161242049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 161242049 is about 12698.1120250217. The cubic root of 161242049 is about 544.2846704739.

The spelling of 161242049 in words is "one hundred sixty-one million, two hundred forty-two thousand, forty-nine".