2591667 has 24 divisors (see below), whose sum is σ = 4271904. Its totient is φ = 1499904.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591667 is 7661952.

2591667 is a `hidden beast` number, since 2 + 591 + 6 + 67 = 666.

It is not a de Polignac number, because 2591667 - 2⁷ = 2591539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591669) 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 23 ways as a sum of consecutive naturals, for example, 1338 + ... + 2640.

It is an arithmetic number, because the mean of its divisors is an integer number (177996).

2^2591667 is an apocalyptic number.

2591667 is a deficient number, since it is larger than the sum of its proper divisors (1680237).

2591667 is a wasteful number, since it uses less digits than its factorization.

2591667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1336 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 2591667 is about 1609.8655223341. The cubic root of 2591667 is about 137.3598262952.

The spelling of 2591667 in words is "two million, five hundred ninety-one thousand, six hundred sixty-seven".