1611161 has 2 divisors, whose sum is σ = 1611162. Its totient is φ = 1611160.

The previous prime is 1611157. The next prime is 1611187.

1611161 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 697225 = 956^2 + 835^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1611161 - 2² = 1611157 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1611131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805580 + 805581.

It is an arithmetic number, because the mean of its divisors is an integer number (805581).

2^1611161 is an apocalyptic number.

It is an amenable number.

1611161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611161 is an equidigital number, since it uses as much as digits as its factorization.

1611161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 17.

The square root of 1611161 is about 1269.3151696880. The cubic root of 1611161 is about 117.2320376252.

The spelling of 1611161 in words is "one million, six hundred eleven thousand, one hundred sixty-one".