12380805 has 12 divisors (see below), whose sum is σ = 21460140. Its totient is φ = 6603072.

The previous prime is 12380803. The next prime is 12380813. The reversal of 12380805 is 50808321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 3272481 = 3018^2 + 1809^2 .

It is not a de Polignac number, because 12380805 - 2¹ = 12380803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12380803) 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 11 ways as a sum of consecutive naturals, for example, 137520 + ... + 137609.

It is an arithmetic number, because the mean of its divisors is an integer number (1788345).

Almost surely, 2^12380805 is an apocalyptic number.

12380805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12380805 is a deficient number, since it is larger than the sum of its proper divisors (9079335).

12380805 is a wasteful number, since it uses less digits than its factorization.

12380805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275140 (or 275137 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12380805 is about 3518.6368099024. The cubic root of 12380805 is about 231.3394122227.

The spelling of 12380805 in words is "twelve million, three hundred eighty thousand, eight hundred five".