12855418 has 4 divisors (see below), whose sum is σ = 19283130. Its totient is φ = 6427708.

The previous prime is 12855407. The next prime is 12855449. The reversal of 12855418 is 81455821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81455821 = 347 ⋅234743.

It can be written as a sum of positive squares in only one way, i.e., 11716929 + 1138489 = 3423^2 + 1067^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213853 + ... + 3213856.

Almost surely, 2^12855418 is an apocalyptic number.

12855418 is a deficient number, since it is larger than the sum of its proper divisors (6427712).

12855418 is an equidigital number, since it uses as much as digits as its factorization.

12855418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427711.

The product of its digits is 12800, while the sum is 34.

The square root of 12855418 is about 3585.4453000987. The cubic root of 12855418 is about 234.2585230546.

The spelling of 12855418 in words is "twelve million, eight hundred fifty-five thousand, four hundred eighteen".