2052161 has 6 divisors (see below), whose sum is σ = 2099010. Its totient is φ = 2006336.

The previous prime is 2052157. The next prime is 2052163. The reversal of 2052161 is 1612502.

It can be written as a sum of positive squares in only one way, i.e., 1168561 + 883600 = 1081^2 + 940^2 .

It is not a de Polignac number, because 2052161 - 2² = 2052157 is a prime.

It is a super-2 number, since 2×2052161² = 8422729539842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2052163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1745 + ... + 2673.

It is an arithmetic number, because the mean of its divisors is an integer number (349835).

2^2052161 is an apocalyptic number.

It is an amenable number.

2052161 is a deficient number, since it is larger than the sum of its proper divisors (46849).

2052161 is an frugal number, since it uses more digits than its factorization.

2052161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2052161 is about 1432.5365614880. The cubic root of 2052161 is about 127.0780308696.

Adding to 2052161 its reverse (1612502), we get a palindrome (3664663).

The spelling of 2052161 in words is "two million, fifty-two thousand, one hundred sixty-one".