2656161 has 6 divisors (see below), whose sum is σ = 3836690. Its totient is φ = 1770768.

The previous prime is 2656141. The next prime is 2656163. The reversal of 2656161 is 1616562.

2656161 = T₄₃₀ + T₄₃₁ + ... + T₄₅₆.

It is a happy number.

2656161 is a `hidden beast` number, since 2 + 656 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 608400 = 1431^2 + 780^2 .

It is not a de Polignac number, because 2656161 - 2⁷ = 2656033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2656163) 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, 147556 + ... + 147573.

2^2656161 is an apocalyptic number.

It is an amenable number.

2656161 is a deficient number, since it is larger than the sum of its proper divisors (1180529).

2656161 is a wasteful number, since it uses less digits than its factorization.

2656161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295135 (or 295132 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2656161 is about 1629.7732971183. The cubic root of 2656161 is about 138.4899096421.

The spelling of 2656161 in words is "two million, six hundred fifty-six thousand, one hundred sixty-one".