2152161 has 12 divisors (see below), whose sum is σ = 3391440. Its totient is φ = 1304280.

The previous prime is 2152159. The next prime is 2152169. The reversal of 2152161 is 1612512.

It is not a de Polignac number, because 2152161 - 2¹ = 2152159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2152169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10771 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (282620).

2^2152161 is an apocalyptic number.

It is an amenable number.

2152161 is a deficient number, since it is larger than the sum of its proper divisors (1239279).

2152161 is a wasteful number, since it uses less digits than its factorization.

2152161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21756 (or 21753 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 2152161 is about 1467.0245396721. The cubic root of 2152161 is about 129.1095157967.

Adding to 2152161 its reverse (1612512), we get a palindrome (3764673).

The spelling of 2152161 in words is "two million, one hundred fifty-two thousand, one hundred sixty-one".