12136749 has 4 divisors (see below), whose sum is σ = 16182336. Its totient is φ = 8091164.

The previous prime is 12136741. The next prime is 12136769. The reversal of 12136749 is 94763121.

12136749 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94763121 = 3 ⋅31587707.

It is a cyclic number.

It is not a de Polignac number, because 12136749 - 2³ = 12136741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12136741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2022789 + ... + 2022794.

It is an arithmetic number, because the mean of its divisors is an integer number (4045584).

Almost surely, 2^12136749 is an apocalyptic number.

It is an amenable number.

12136749 is a deficient number, since it is larger than the sum of its proper divisors (4045587).

12136749 is an equidigital number, since it uses as much as digits as its factorization.

12136749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4045586.

The product of its digits is 9072, while the sum is 33.

The square root of 12136749 is about 3483.7837188896. The cubic root of 12136749 is about 229.8092242857.

The spelling of 12136749 in words is "twelve million, one hundred thirty-six thousand, seven hundred forty-nine".