2688251 has 4 divisors (see below), whose sum is σ = 2708904. Its totient is φ = 2667600.

The previous prime is 2688239. The next prime is 2688299. The reversal of 2688251 is 1528862.

2688251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1528862 = 2 ⋅764431.

It is a cyclic number.

It is not a de Polignac number, because 2688251 - 2⁶ = 2688187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688221) 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 3 ways as a sum of consecutive naturals, for example, 10130 + ... + 10391.

It is an arithmetic number, because the mean of its divisors is an integer number (677226).

2^2688251 is an apocalyptic number.

2688251 is a deficient number, since it is larger than the sum of its proper divisors (20653).

2688251 is a wasteful number, since it uses less digits than its factorization.

2688251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652.

The product of its digits is 7680, while the sum is 32.

The square root of 2688251 is about 1639.5886679286. The cubic root of 2688251 is about 139.0453934519.

The spelling of 2688251 in words is "two million, six hundred eighty-eight thousand, two hundred fifty-one".