12378397 has 8 divisors (see below), whose sum is σ = 13176000. Its totient is φ = 11588544.

The previous prime is 12378349. The next prime is 12378403. The reversal of 12378397 is 79387321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12378397 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 (12378307) 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 7 ways as a sum of consecutive naturals, for example, 1554 + ... + 5212.

It is an arithmetic number, because the mean of its divisors is an integer number (1647000).

Almost surely, 2^12378397 is an apocalyptic number.

12378397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12378397 is a deficient number, since it is larger than the sum of its proper divisors (797603).

12378397 is a wasteful number, since it uses less digits than its factorization.

12378397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875.

The product of its digits is 63504, while the sum is 40.

The square root of 12378397 is about 3518.2946152930. The cubic root of 12378397 is about 231.3244131596.

The spelling of 12378397 in words is "twelve million, three hundred seventy-eight thousand, three hundred ninety-seven".