2742161 has 2 divisors, whose sum is σ = 2742162. Its totient is φ = 2742160.

The previous prime is 2742139. The next prime is 2742163. The reversal of 2742161 is 1612472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 3136 = 1655^2 + 56^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2742161 is a prime.

Together with 2742163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2742163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371080 + 1371081.

It is an arithmetic number, because the mean of its divisors is an integer number (1371081).

2^2742161 is an apocalyptic number.

It is an amenable number.

2742161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742161 is an equidigital number, since it uses as much as digits as its factorization.

2742161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 2742161 is about 1655.9471609928. The cubic root of 2742161 is about 139.9687175004.

The spelling of 2742161 in words is "two million, seven hundred forty-two thousand, one hundred sixty-one".