12855431 has 4 divisors (see below), whose sum is σ = 12891600. Its totient is φ = 12819264.

The previous prime is 12855407. The next prime is 12855449. The reversal of 12855431 is 13455821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13455821 = 89 ⋅151189.

It is a cyclic number.

It is not a de Polignac number, because 12855431 - 2¹⁰ = 12854407 is a prime.

It is a super-2 number, since 2×12855431² = 330524212391522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12855394 and 12855403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17546 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (3222900).

Almost surely, 2^12855431 is an apocalyptic number.

12855431 is a deficient number, since it is larger than the sum of its proper divisors (36169).

12855431 is an equidigital number, since it uses as much as digits as its factorization.

12855431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36168.

The product of its digits is 4800, while the sum is 29.

The square root of 12855431 is about 3585.4471129833. The cubic root of 12855431 is about 234.2586020190.

The spelling of 12855431 in words is "twelve million, eight hundred fifty-five thousand, four hundred thirty-one".