12380845 has 16 divisors (see below), whose sum is σ = 15882480. Its totient is φ = 9232384.

The previous prime is 12380843. The next prime is 12380887. The reversal of 12380845 is 54808321.

It can be written as a sum of positive squares in 8 ways, for example, as 81796 + 12299049 = 286^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 12380845 - 2¹ = 12380843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12380843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8961 + ... + 10249.

It is an arithmetic number, because the mean of its divisors is an integer number (992655).

Almost surely, 2^12380845 is an apocalyptic number.

It is an amenable number.

12380845 is a deficient number, since it is larger than the sum of its proper divisors (3501635).

12380845 is a wasteful number, since it uses less digits than its factorization.

12380845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 12380845 is about 3518.6424939172. The cubic root of 12380845 is about 231.3396613601.

It can be divided in two parts, 12380 and 845, that added together give a square (13225 = 115²).

The spelling of 12380845 in words is "twelve million, three hundred eighty thousand, eight hundred forty-five".