12136771 has 4 divisors (see below), whose sum is σ = 12190000. Its totient is φ = 12083544.

The previous prime is 12136769. The next prime is 12136783. The reversal of 12136771 is 17763121.

12136771 = T₂₈₄₃ + T₂₈₄₄ + T₂₈₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17763121 = 173 ⋅102677.

It is a cyclic number.

It is not a de Polignac number, because 12136771 - 2¹ = 12136769 is a prime.

It is a Duffinian 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26271 + ... + 26728.

It is an arithmetic number, because the mean of its divisors is an integer number (3047500).

Almost surely, 2^12136771 is an apocalyptic number.

12136771 is the 2845-th centered triangular number.

12136771 is a deficient number, since it is larger than the sum of its proper divisors (53229).

12136771 is an equidigital number, since it uses as much as digits as its factorization.

12136771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53228.

The product of its digits is 1764, while the sum is 28.

The square root of 12136771 is about 3483.7868763746. The cubic root of 12136771 is about 229.8093631422.

Adding to 12136771 its reverse (17763121), we get a palindrome (29899892).

The spelling of 12136771 in words is "twelve million, one hundred thirty-six thousand, seven hundred seventy-one".