2638751 has 4 divisors (see below), whose sum is σ = 2723904. Its totient is φ = 2553600.

The previous prime is 2638747. The next prime is 2638771. The reversal of 2638751 is 1578362.

It is a happy number.

2638751 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: 1578362 = 2 ⋅789181.

It is a cyclic number.

It is not a de Polignac number, because 2638751 - 2² = 2638747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638771) 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, 42530 + ... + 42591.

It is an arithmetic number, because the mean of its divisors is an integer number (680976).

2^2638751 is an apocalyptic number.

2638751 is a deficient number, since it is larger than the sum of its proper divisors (85153).

2638751 is an equidigital number, since it uses as much as digits as its factorization.

2638751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85152.

The product of its digits is 10080, while the sum is 32.

The square root of 2638751 is about 1624.4232822759. The cubic root of 2638751 is about 138.1866654080.

The spelling of 2638751 in words is "two million, six hundred thirty-eight thousand, seven hundred fifty-one".