12136791 has 4 divisors (see below), whose sum is σ = 16182392. Its totient is φ = 8091192.

The previous prime is 12136783. The next prime is 12136829. The reversal of 12136791 is 19763121.

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

It is not a de Polignac number, because 12136791 - 2³ = 12136783 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 (12136711) 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, 2022796 + ... + 2022801.

It is an arithmetic number, because the mean of its divisors is an integer number (4045598).

Almost surely, 2^12136791 is an apocalyptic number.

12136791 is a deficient number, since it is larger than the sum of its proper divisors (4045601).

12136791 is an equidigital number, since it uses as much as digits as its factorization.

12136791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045600.

The product of its digits is 2268, while the sum is 30.

The square root of 12136791 is about 3483.7897468131. The cubic root of 12136791 is about 229.8094893752.

The spelling of 12136791 in words is "twelve million, one hundred thirty-six thousand, seven hundred ninety-one".