12782591 has 8 divisors (see below), whose sum is σ = 13292400. Its totient is φ = 12277440.

The previous prime is 12782513. The next prime is 12782599. The reversal of 12782591 is 19528721.

12782591 = T₄₉₈ + T₄₉₉ + ... + T₅₈₄.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12782591 - 2¹⁰ = 12781567 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 (12782599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5075 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (1661550).

Almost surely, 2^12782591 is an apocalyptic number.

12782591 is a deficient number, since it is larger than the sum of its proper divisors (509809).

12782591 is a wasteful number, since it uses less digits than its factorization.

12782591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329.

The product of its digits is 10080, while the sum is 35.

The square root of 12782591 is about 3575.2749544615. The cubic root of 12782591 is about 233.8153204734.

The spelling of 12782591 in words is "twelve million, seven hundred eighty-two thousand, five hundred ninety-one".