11957161 has 2 divisors, whose sum is σ = 11957162. Its totient is φ = 11957160.

The previous prime is 11957147. The next prime is 11957189. The reversal of 11957161 is 16175911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11943936 + 13225 = 3456^2 + 115^2 .

It is an emirp because it is prime and its reverse (16175911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11957161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11957111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978580 + 5978581.

It is an arithmetic number, because the mean of its divisors is an integer number (5978581).

Almost surely, 2^11957161 is an apocalyptic number.

It is an amenable number.

11957161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11957161 is an equidigital number, since it uses as much as digits as its factorization.

11957161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 31.

The square root of 11957161 is about 3457.9128097741. The cubic root of 11957161 is about 228.6700880451.

The spelling of 11957161 in words is "eleven million, nine hundred fifty-seven thousand, one hundred sixty-one".