2748139 has 4 divisors (see below), whose sum is σ = 2789224. Its totient is φ = 2707056.

The previous prime is 2748133. The next prime is 2748149. The reversal of 2748139 is 9318472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2748139 - 2³ = 2748131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2748131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20442 + ... + 20575.

It is an arithmetic number, because the mean of its divisors is an integer number (697306).

2^2748139 is an apocalyptic number.

2748139 is a deficient number, since it is larger than the sum of its proper divisors (41085).

2748139 is an equidigital number, since it uses as much as digits as its factorization.

2748139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41084.

The product of its digits is 12096, while the sum is 34.

The square root of 2748139 is about 1657.7511876033. The cubic root of 2748139 is about 140.0703557938.

The spelling of 2748139 in words is "two million, seven hundred forty-eight thousand, one hundred thirty-nine".