2775239 has 4 divisors (see below), whose sum is σ = 2827656. Its totient is φ = 2722824.

The previous prime is 2775221. The next prime is 2775247. The reversal of 2775239 is 9325772.

2775239 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.

It is a cyclic number.

It is not a de Polignac number, because 2775239 - 2¹² = 2771143 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2775199 and 2775208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775299) 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, 26129 + ... + 26234.

It is an arithmetic number, because the mean of its divisors is an integer number (706914).

2^2775239 is an apocalyptic number.

2775239 is a deficient number, since it is larger than the sum of its proper divisors (52417).

2775239 is an equidigital number, since it uses as much as digits as its factorization.

2775239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52416.

The product of its digits is 26460, while the sum is 35.

The square root of 2775239 is about 1665.9048592282. The cubic root of 2775239 is about 140.5292720678.

The spelling of 2775239 in words is "two million, seven hundred seventy-five thousand, two hundred thirty-nine".