12855830 has 24 divisors (see below), whose sum is σ = 25060752. Its totient is φ = 4746144.

The previous prime is 12855823. The next prime is 12855833. The reversal of 12855830 is 3855821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2114 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (1044198).

Almost surely, 2^12855830 is an apocalyptic number.

12855830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12855830 is a deficient number, since it is larger than the sum of its proper divisors (12204922).

12855830 is a wasteful number, since it uses less digits than its factorization.

12855830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640 (or 7627 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 12855830 is about 3585.5027541476. The cubic root of 12855830 is about 234.2610255917.

Subtracting from 12855830 its reverse (3855821), we obtain a palindrome (9000009).

The spelling of 12855830 in words is "twelve million, eight hundred fifty-five thousand, eight hundred thirty".