2512161 has 32 divisors (see below), whose sum is σ = 4032000. Its totient is φ = 1540944.

The previous prime is 2512127. The next prime is 2512171. The reversal of 2512161 is 1612152.

2512161 is a nontrivial binomial coefficient, being equal to C(2242, 2).

It is not a de Polignac number, because 2512161 - 2⁷ = 2512033 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2512171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30226 + ... + 30308.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2^2512161 is an apocalyptic number.

2512161 is the 2241-st triangular number and also the 1121-st hexagonal number.

It is an amenable number.

2512161 is a deficient number, since it is larger than the sum of its proper divisors (1519839).

2512161 is a wasteful number, since it uses less digits than its factorization.

2512161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 164 counting only the distinct ones).

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

The square root of 2512161 is about 1584.9798105970. The cubic root of 2512161 is about 135.9405918441.

Subtracting from 2512161 its reverse (1612152), we obtain a palindrome (900009).

The spelling of 2512161 in words is "two million, five hundred twelve thousand, one hundred sixty-one".