2567791 has 4 divisors (see below), whose sum is σ = 2586672. Its totient is φ = 2548912.

The previous prime is 2567783. The next prime is 2567801. The reversal of 2567791 is 1977652.

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 2567791 - 2³ = 2567783 is a prime.

It is a Duffinian number.

2567791 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2567791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2567701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9235 + ... + 9508.

It is an arithmetic number, because the mean of its divisors is an integer number (646668).

2^2567791 is an apocalyptic number.

2567791 is a deficient number, since it is larger than the sum of its proper divisors (18881).

2567791 is a wasteful number, since it uses less digits than its factorization.

2567791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18880.

The product of its digits is 26460, while the sum is 37.

The square root of 2567791 is about 1602.4328379062. The cubic root of 2567791 is about 136.9367104261.

The spelling of 2567791 in words is "two million, five hundred sixty-seven thousand, seven hundred ninety-one".