2645657 has 6 divisors (see below), whose sum is σ = 3077658. Its totient is φ = 2267664.

The previous prime is 2645651. The next prime is 2645663. The reversal of 2645657 is 7565462.

2645657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2645651) and next prime (2645663).

It can be written as a sum of positive squares in only one way, i.e., 2637376 + 8281 = 1624^2 + 91^2 .

It is not a de Polignac number, because 2645657 - 2²⁰ = 1597081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26948 + ... + 27045.

It is an arithmetic number, because the mean of its divisors is an integer number (512943).

2^2645657 is an apocalyptic number.

It is an amenable number.

2645657 is a deficient number, since it is larger than the sum of its proper divisors (432001).

2645657 is an equidigital number, since it uses as much as digits as its factorization.

2645657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54007 (or 54000 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 2645657 is about 1626.5475707768. The cubic root of 2645657 is about 138.3071120120.

The spelling of 2645657 in words is "two million, six hundred forty-five thousand, six hundred fifty-seven".