12766491 has 24 divisors (see below), whose sum is σ = 19341504. Its totient is φ = 8414280.

The previous prime is 12766483. The next prime is 12766519. The reversal of 12766491 is 19466721.

12766491 is a `hidden beast` number, since 1 + 2 + 7 + 6 + 649 + 1 = 666.

12766491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12766491 - 2³ = 12766483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12766441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25756 + ... + 26246.

It is an arithmetic number, because the mean of its divisors is an integer number (805896).

Almost surely, 2^12766491 is an apocalyptic number.

12766491 is a deficient number, since it is larger than the sum of its proper divisors (6575013).

12766491 is an equidigital number, since it uses as much as digits as its factorization.

12766491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 601 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12766491 is about 3573.0226699533. The cubic root of 12766491 is about 233.7171137736.

The spelling of 12766491 in words is "twelve million, seven hundred sixty-six thousand, four hundred ninety-one".