3126161 has 4 divisors (see below), whose sum is σ = 3139812. Its totient is φ = 3112512.

The previous prime is 3126139. The next prime is 3126163. The reversal of 3126161 is 1616213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1616213 = 283 ⋅5711.

It can be written as a sum of positive squares in 2 ways, for example, as 891136 + 2235025 = 944^2 + 1495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3126161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3126163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6476 + ... + 6941.

It is an arithmetic number, because the mean of its divisors is an integer number (784953).

Almost surely, 2^3126161 is an apocalyptic number.

It is an amenable number.

3126161 is a deficient number, since it is larger than the sum of its proper divisors (13651).

3126161 is a wasteful number, since it uses less digits than its factorization.

3126161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13650.

The product of its digits is 216, while the sum is 20.

The square root of 3126161 is about 1768.0953028612. The cubic root of 3126161 is about 146.2189901868.

The spelling of 3126161 in words is "three million, one hundred twenty-six thousand, one hundred sixty-one".