12865723 has 4 divisors (see below), whose sum is σ = 13855408. Its totient is φ = 11876040.

The previous prime is 12865711. The next prime is 12865757. The reversal of 12865723 is 32756821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32756821 = 179 ⋅182999.

It is a cyclic number.

It is not a de Polignac number, because 12865723 - 2¹⁷ = 12734651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12865123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494823 + ... + 494848.

It is an arithmetic number, because the mean of its divisors is an integer number (3463852).

Almost surely, 2^12865723 is an apocalyptic number.

12865723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12865723 is a deficient number, since it is larger than the sum of its proper divisors (989685).

12865723 is an equidigital number, since it uses as much as digits as its factorization.

12865723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989684.

The product of its digits is 20160, while the sum is 34.

The square root of 12865723 is about 3586.8820722182. The cubic root of 12865723 is about 234.3211008028.

The spelling of 12865723 in words is "twelve million, eight hundred sixty-five thousand, seven hundred twenty-three".