12786397 has 16 divisors (see below), whose sum is σ = 14902272. Its totient is φ = 10863360.

The previous prime is 12786391. The next prime is 12786427. The reversal of 12786397 is 79368721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12786397 - 2⁷ = 12786269 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 (12786391) 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 15 ways as a sum of consecutive naturals, for example, 9772 + ... + 11002.

It is an arithmetic number, because the mean of its divisors is an integer number (931392).

Almost surely, 2^12786397 is an apocalyptic number.

12786397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12786397 is a deficient number, since it is larger than the sum of its proper divisors (2115875).

12786397 is a wasteful number, since it uses less digits than its factorization.

12786397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308.

The product of its digits is 127008, while the sum is 43.

The square root of 12786397 is about 3575.8071816025. The cubic root of 12786397 is about 233.8385242407.

The spelling of 12786397 in words is "twelve million, seven hundred eighty-six thousand, three hundred ninety-seven".