12318751 has 4 divisors (see below), whose sum is σ = 12327192. Its totient is φ = 12310312.

The previous prime is 12318703. The next prime is 12318763. The reversal of 12318751 is 15781321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15781321 = 17 ⋅928313.

It is a cyclic number.

It is not a de Polignac number, because 12318751 - 2⁷ = 12318623 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 (12318701) 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, 1405 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (3081798).

Almost surely, 2^12318751 is an apocalyptic number.

12318751 is a deficient number, since it is larger than the sum of its proper divisors (8441).

12318751 is an equidigital number, since it uses as much as digits as its factorization.

12318751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440.

The product of its digits is 1680, while the sum is 28.

The square root of 12318751 is about 3509.8078294972. The cubic root of 12318751 is about 230.9522648939.

The spelling of 12318751 in words is "twelve million, three hundred eighteen thousand, seven hundred fifty-one".