2742709 has 4 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 2733580.

The previous prime is 2742703. The next prime is 2742721. The reversal of 2742709 is 9072472.

It is a happy number.

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 2742709 - 2⁹ = 2742197 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2742709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742703) 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, 4099 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

2^2742709 is an apocalyptic number.

It is an amenable number.

2742709 is a deficient number, since it is larger than the sum of its proper divisors (9131).

2742709 is an equidigital number, since it uses as much as digits as its factorization.

2742709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9130.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 2742709 is about 1656.1126169437. The cubic root of 2742709 is about 139.9780407735.

The spelling of 2742709 in words is "two million, seven hundred forty-two thousand, seven hundred nine".