12726431 has 8 divisors (see below), whose sum is σ = 12899328. Its totient is φ = 12555000.

The previous prime is 12726407. The next prime is 12726433. The reversal of 12726431 is 13462721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12726431 - 2⁶ = 12726367 is a prime.

It is a super-2 number, since 2×12726431² = 323924091995522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12726431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726433) 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 7 ways as a sum of consecutive naturals, for example, 40766 + ... + 41076.

It is an arithmetic number, because the mean of its divisors is an integer number (1612416).

Almost surely, 2^12726431 is an apocalyptic number.

12726431 is a deficient number, since it is larger than the sum of its proper divisors (172897).

12726431 is a wasteful number, since it uses less digits than its factorization.

12726431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its digits is 2016, while the sum is 26.

The square root of 12726431 is about 3567.4123675292. The cubic root of 12726431 is about 233.4723971486.

The spelling of 12726431 in words is "twelve million, seven hundred twenty-six thousand, four hundred thirty-one".