2657161 has 4 divisors (see below), whose sum is σ = 2861572. Its totient is φ = 2452752.

The previous prime is 2657159. The next prime is 2657173. The reversal of 2657161 is 1617562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 2449225 = 456^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2657161 - 2¹ = 2657159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2657101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102186 + ... + 102211.

It is an arithmetic number, because the mean of its divisors is an integer number (715393).

2^2657161 is an apocalyptic number.

It is an amenable number.

2657161 is a deficient number, since it is larger than the sum of its proper divisors (204411).

2657161 is a wasteful number, since it uses less digits than its factorization.

2657161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204410.

The product of its digits is 2520, while the sum is 28.

The square root of 2657161 is about 1630.0800593836. The cubic root of 2657161 is about 138.5072871697.

The spelling of 2657161 in words is "two million, six hundred fifty-seven thousand, one hundred sixty-one".