7185161 has 2 divisors, whose sum is σ = 7185162. Its totient is φ = 7185160.

The previous prime is 7185151. The next prime is 7185163. The reversal of 7185161 is 1615817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7075600 + 109561 = 2660^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 7185161 - 2¹⁰ = 7184137 is a prime.

Together with 7185163, 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 (7185163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3592580 + 3592581.

It is an arithmetic number, because the mean of its divisors is an integer number (3592581).

Almost surely, 2^7185161 is an apocalyptic number.

It is an amenable number.

7185161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7185161 is an equidigital number, since it uses as much as digits as its factorization.

7185161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 7185161 is about 2680.5150624460. The cubic root of 7185161 is about 192.9651292294.

The spelling of 7185161 in words is "seven million, one hundred eighty-five thousand, one hundred sixty-one".