2012161 has 2 divisors, whose sum is σ = 2012162. Its totient is φ = 2012160.

The previous prime is 2012159. The next prime is 2012167. The reversal of 2012161 is 1612102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 309136 = 1305^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012161 - 2¹ = 2012159 is a prime.

Together with 2012159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2012167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006080 + 1006081.

It is an arithmetic number, because the mean of its divisors is an integer number (1006081).

2^2012161 is an apocalyptic number.

It is an amenable number.

2012161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012161 is an equidigital number, since it uses as much as digits as its factorization.

2012161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2012161 is about 1418.5066090787. The cubic root of 2012161 is about 126.2469541467.

Adding to 2012161 its reverse (1612102), we get a palindrome (3624263).

The spelling of 2012161 in words is "two million, twelve thousand, one hundred sixty-one".