12723559 has 4 divisors (see below), whose sum is σ = 13393240. Its totient is φ = 12053880.

The previous prime is 12723539. The next prime is 12723569. The reversal of 12723559 is 95532721.

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 12723559 - 2¹⁵ = 12690791 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 (12723509) 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, 334812 + ... + 334849.

It is an arithmetic number, because the mean of its divisors is an integer number (3348310).

Almost surely, 2^12723559 is an apocalyptic number.

12723559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12723559 is a deficient number, since it is larger than the sum of its proper divisors (669681).

12723559 is an equidigital number, since it uses as much as digits as its factorization.

12723559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669680.

The product of its digits is 18900, while the sum is 34.

The square root of 12723559 is about 3567.0098121536. The cubic root of 12723559 is about 233.4548330944.

The spelling of 12723559 in words is "twelve million, seven hundred twenty-three thousand, five hundred fifty-nine".