2688129 has 6 divisors (see below), whose sum is σ = 3882866. Its totient is φ = 1792080.

The previous prime is 2688073. The next prime is 2688137. The reversal of 2688129 is 9218862.

It can be written as a sum of positive squares in only one way, i.e., 2169729 + 518400 = 1473^2 + 720^2 .

It is not a de Polignac number, because 2688129 - 2¹⁵ = 2655361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2688093 and 2688102.

It is not an unprimeable number, because it can be changed into a prime (2688529) 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, 149332 + ... + 149349.

2^2688129 is an apocalyptic number.

It is an amenable number.

2688129 is a deficient number, since it is larger than the sum of its proper divisors (1194737).

2688129 is a wasteful number, since it uses less digits than its factorization.

2688129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298687 (or 298684 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2688129 is about 1639.5514630532. The cubic root of 2688129 is about 139.0432900031.

The spelling of 2688129 in words is "two million, six hundred eighty-eight thousand, one hundred twenty-nine".