12109751 has 4 divisors (see below), whose sum is σ = 12275712. Its totient is φ = 11943792.

The previous prime is 12109697. The next prime is 12109817. The reversal of 12109751 is 15790121.

12109751 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12109751 - 2⁶ = 12109687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12109751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12109051) 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, 82871 + ... + 83016.

It is an arithmetic number, because the mean of its divisors is an integer number (3068928).

Almost surely, 2^12109751 is an apocalyptic number.

12109751 is a deficient number, since it is larger than the sum of its proper divisors (165961).

12109751 is an equidigital number, since it uses as much as digits as its factorization.

12109751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165960.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 12109751 is about 3479.9067516242. The cubic root of 12109751 is about 229.6386954878.

Adding to 12109751 its reverse (15790121), we get a palindrome (27899872).

The spelling of 12109751 in words is "twelve million, one hundred nine thousand, seven hundred fifty-one".