12318951 has 4 divisors (see below), whose sum is σ = 16425272. Its totient is φ = 8212632.

The previous prime is 12318947. The next prime is 12318953. The reversal of 12318951 is 15981321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15981321 = 3 ⋅5327107.

It is not a de Polignac number, because 12318951 - 2² = 12318947 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 (12318953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053156 + ... + 2053161.

It is an arithmetic number, because the mean of its divisors is an integer number (4106318).

Almost surely, 2^12318951 is an apocalyptic number.

12318951 is a deficient number, since it is larger than the sum of its proper divisors (4106321).

12318951 is an equidigital number, since it uses as much as digits as its factorization.

12318951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106320.

The product of its digits is 2160, while the sum is 30.

The square root of 12318951 is about 3509.8363209700. The cubic root of 12318951 is about 230.9535147555.

The spelling of 12318951 in words is "twelve million, three hundred eighteen thousand, nine hundred fifty-one".