8742161 has 2 divisors, whose sum is σ = 8742162. Its totient is φ = 8742160.

The previous prime is 8742157. The next prime is 8742169. The reversal of 8742161 is 1612478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8737936 + 4225 = 2956^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 8742161 - 2² = 8742157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8742169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4371080 + 4371081.

It is an arithmetic number, because the mean of its divisors is an integer number (4371081).

Almost surely, 2^8742161 is an apocalyptic number.

It is an amenable number.

8742161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8742161 is an equidigital number, since it uses as much as digits as its factorization.

8742161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 8742161 is about 2956.7145618067. The cubic root of 8742161 is about 206.0027099276.

The spelling of 8742161 in words is "eight million, seven hundred forty-two thousand, one hundred sixty-one".