12381255 has 40 divisors (see below), whose sum is σ = 23377200. Its totient is φ = 6251904.

The previous prime is 12381227. The next prime is 12381319. The reversal of 12381255 is 55218321.

It is a happy number.

It is not a de Polignac number, because 12381255 - 2⁵ = 12381223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6891 + ... + 8499.

It is an arithmetic number, because the mean of its divisors is an integer number (584430).

Almost surely, 2^12381255 is an apocalyptic number.

12381255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12381255 is a deficient number, since it is larger than the sum of its proper divisors (10995945).

12381255 is a wasteful number, since it uses less digits than its factorization.

12381255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1636 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 12381255 is about 3518.7007545399. The cubic root of 12381255 is about 231.3422149880.

Adding to 12381255 its reverse (55218321), we get a palindrome (67599576).

The spelling of 12381255 in words is "twelve million, three hundred eighty-one thousand, two hundred fifty-five".