2645128 has 8 divisors (see below), whose sum is σ = 4959630. Its totient is φ = 1322560.

The previous prime is 2645101. The next prime is 2645129. The reversal of 2645128 is 8215462.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 1304164 = 1158^2 + 1142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2645096 and 2645105.

It is not an unprimeable number, because it can be changed into a prime (2645129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165313 + ... + 165328.

2^2645128 is an apocalyptic number.

It is an amenable number.

2645128 is a deficient number, since it is larger than the sum of its proper divisors (2314502).

2645128 is a wasteful number, since it uses less digits than its factorization.

2645128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330647 (or 330643 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2645128 is about 1626.3849482825. The cubic root of 2645128 is about 138.2978932131.

It can be divided in two parts, 26 and 45128, that added together give a palindrome (45154).

The spelling of 2645128 in words is "two million, six hundred forty-five thousand, one hundred twenty-eight".