2656945 has 8 divisors (see below), whose sum is σ = 3197160. Its totient is φ = 2119680.

The previous prime is 2656921. The next prime is 2656949. The reversal of 2656945 is 5496562.

It can be written as a sum of positive squares in 4 ways, for example, as 831744 + 1825201 = 912^2 + 1351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2656945 - 2¹⁵ = 2624177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2656949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2791 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (399645).

2^2656945 is an apocalyptic number.

It is an amenable number.

2656945 is a deficient number, since it is larger than the sum of its proper divisors (540215).

2656945 is an equidigital number, since it uses as much as digits as its factorization.

2656945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its digits is 64800, while the sum is 37.

The square root of 2656945 is about 1630.0138036225. The cubic root of 2656945 is about 138.5035339930.

It can be divided in two parts, 2656 and 945, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 2656945 in words is "two million, six hundred fifty-six thousand, nine hundred forty-five".