2272749 has 4 divisors (see below), whose sum is σ = 3030336. Its totient is φ = 1515164.

The previous prime is 2272733. The next prime is 2272757. The reversal of 2272749 is 9472722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2272749 - 2⁴ = 2272733 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378789 + ... + 378794.

It is an arithmetic number, because the mean of its divisors is an integer number (757584).

2^2272749 is an apocalyptic number.

It is an amenable number.

2272749 is a deficient number, since it is larger than the sum of its proper divisors (757587).

2272749 is an equidigital number, since it uses as much as digits as its factorization.

2272749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757586.

The product of its digits is 14112, while the sum is 33.

The square root of 2272749 is about 1507.5639289927. The cubic root of 2272749 is about 131.4772136878.

It can be divided in two parts, 22 and 72749, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 2272749 in words is "two million, two hundred seventy-two thousand, seven hundred forty-nine".