2125161 has 6 divisors (see below), whose sum is σ = 3069690. Its totient is φ = 1416768.

The previous prime is 2125157. The next prime is 2125163. The reversal of 2125161 is 1615212.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 1010025 = 1056^2 + 1005^2 .

It is not a de Polignac number, because 2125161 - 2² = 2125157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125163) 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, 118056 + ... + 118073.

It is an arithmetic number, because the mean of its divisors is an integer number (511615).

2^2125161 is an apocalyptic number.

It is an amenable number.

2125161 is a deficient number, since it is larger than the sum of its proper divisors (944529).

2125161 is a wasteful number, since it uses less digits than its factorization.

2125161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236135 (or 236132 counting only the distinct ones).

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

The square root of 2125161 is about 1457.7931952098. The cubic root of 2125161 is about 128.5673263241.

It can be divided in two parts, 21251 and 61, that added together give a palindrome (21312).

The spelling of 2125161 in words is "two million, one hundred twenty-five thousand, one hundred sixty-one".