2791247 has 4 divisors (see below), whose sum is σ = 2955456. Its totient is φ = 2627040.

The previous prime is 2791241. The next prime is 2791253. The reversal of 2791247 is 7421972.

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

It is an interprime number because it is at equal distance from previous prime (2791241) and next prime (2791253).

It is a cyclic number.

It is not a de Polignac number, because 2791247 - 2⁶ = 2791183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791241) 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, 82079 + ... + 82112.

It is an arithmetic number, because the mean of its divisors is an integer number (738864).

2^2791247 is an apocalyptic number.

2791247 is a deficient number, since it is larger than the sum of its proper divisors (164209).

2791247 is a wasteful number, since it uses less digits than its factorization.

2791247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164208.

The product of its digits is 7056, while the sum is 32.

The square root of 2791247 is about 1670.7025468347. The cubic root of 2791247 is about 140.7989522725.

The spelling of 2791247 in words is "two million, seven hundred ninety-one thousand, two hundred forty-seven".