12378385 has 8 divisors (see below), whose sum is σ = 14892840. Its totient is φ = 9876864.

The previous prime is 12378349. The next prime is 12378403. The reversal of 12378385 is 58387321.

It can be written as a sum of positive squares in 4 ways, for example, as 1149184 + 11229201 = 1072^2 + 3351^2 .

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 12378385 - 2¹¹ = 12376337 is a prime.

It is an unprimeable number.

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, 982 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (1861605).

Almost surely, 2^12378385 is an apocalyptic number.

It is an amenable number.

12378385 is a deficient number, since it is larger than the sum of its proper divisors (2514455).

12378385 is an equidigital number, since it uses as much as digits as its factorization.

12378385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6467.

The product of its digits is 40320, while the sum is 37.

The square root of 12378385 is about 3518.2929099209. The cubic root of 12378385 is about 231.3243384086.

Multiplying 12378385 by its sum of digits (37), we get a triangular number (458000245 = T₃₀₂₆₅).

The spelling of 12378385 in words is "twelve million, three hundred seventy-eight thousand, three hundred eighty-five".