8457161 has 2 divisors, whose sum is σ = 8457162. Its totient is φ = 8457160.

The previous prime is 8457151. The next prime is 8457179. The reversal of 8457161 is 1617548.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6661561 + 1795600 = 2581^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 8457161 - 2¹⁸ = 8195017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8457131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228580 + 4228581.

It is an arithmetic number, because the mean of its divisors is an integer number (4228581).

Almost surely, 2^8457161 is an apocalyptic number.

It is an amenable number.

8457161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8457161 is an equidigital number, since it uses as much as digits as its factorization.

8457161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 8457161 is about 2908.1198393464. The cubic root of 8457161 is about 203.7393264761.

The spelling of 8457161 in words is "eight million, four hundred fifty-seven thousand, one hundred sixty-one".