12681379 has 4 divisors (see below), whose sum is σ = 13348840. Its totient is φ = 12013920.

The previous prime is 12681377. The next prime is 12681391. The reversal of 12681379 is 97318621.

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 12681379 - 2¹ = 12681377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12681373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333702 + ... + 333739.

It is an arithmetic number, because the mean of its divisors is an integer number (3337210).

Almost surely, 2^12681379 is an apocalyptic number.

12681379 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12681379 is a deficient number, since it is larger than the sum of its proper divisors (667461).

12681379 is an equidigital number, since it uses as much as digits as its factorization.

12681379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667460.

The product of its digits is 18144, while the sum is 37.

The square root of 12681379 is about 3561.0923885797. The cubic root of 12681379 is about 233.1965713302.

The spelling of 12681379 in words is "twelve million, six hundred eighty-one thousand, three hundred seventy-nine".