12723951 has 4 divisors (see below), whose sum is σ = 16965272. Its totient is φ = 8482632.

The previous prime is 12723947. The next prime is 12723959. The reversal of 12723951 is 15932721.

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

It is not a de Polignac number, because 12723951 - 2² = 12723947 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 (12723959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120656 + ... + 2120661.

It is an arithmetic number, because the mean of its divisors is an integer number (4241318).

Almost surely, 2^12723951 is an apocalyptic number.

12723951 is a deficient number, since it is larger than the sum of its proper divisors (4241321).

12723951 is an equidigital number, since it uses as much as digits as its factorization.

12723951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241320.

The product of its digits is 3780, while the sum is 30.

The square root of 12723951 is about 3567.0647597149. The cubic root of 12723951 is about 233.4572305723.

The spelling of 12723951 in words is "twelve million, seven hundred twenty-three thousand, nine hundred fifty-one".