2742731 has 4 divisors (see below), whose sum is σ = 2768472. Its totient is φ = 2716992.

The previous prime is 2742721. The next prime is 2742737. The reversal of 2742731 is 1372472.

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 2742731 - 2⁶ = 2742667 is a prime.

It is a super-2 number, since 2×2742731² = 15045146676722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2742731.

It is not an unprimeable number, because it can be changed into a prime (2742737) 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, 12710 + ... + 12923.

It is an arithmetic number, because the mean of its divisors is an integer number (692118).

2^2742731 is an apocalyptic number.

2742731 is a deficient number, since it is larger than the sum of its proper divisors (25741).

2742731 is a wasteful number, since it uses less digits than its factorization.

2742731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25740.

The product of its digits is 2352, while the sum is 26.

The square root of 2742731 is about 1656.1192589907. The cubic root of 2742731 is about 139.9784150396.

The spelling of 2742731 in words is "two million, seven hundred forty-two thousand, seven hundred thirty-one".