12380391 has 8 divisors (see below), whose sum is σ = 18341360. Its totient is φ = 8253576.

The previous prime is 12380351. The next prime is 12380413. The reversal of 12380391 is 19308321.

It is not a de Polignac number, because 12380391 - 2¹⁴ = 12364007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 458533 = 12380391 / (1 + 2 + 3 + 8 + 0 + 3 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12380321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229240 + ... + 229293.

It is an arithmetic number, because the mean of its divisors is an integer number (2292670).

Almost surely, 2^12380391 is an apocalyptic number.

12380391 is a deficient number, since it is larger than the sum of its proper divisors (5960969).

12380391 is an equidigital number, since it uses as much as digits as its factorization.

12380391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458542 (or 458536 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12380391 is about 3518.5779798095. The cubic root of 12380391 is about 231.3368336186.

The spelling of 12380391 in words is "twelve million, three hundred eighty thousand, three hundred ninety-one".