12856155 has 16 divisors (see below), whose sum is σ = 22152480. Its totient is φ = 6329088.

The previous prime is 12856153. The next prime is 12856163. The reversal of 12856155 is 55165821.

12856155 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12856155 - 2¹ = 12856153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12856153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32770 + ... + 33159.

It is an arithmetic number, because the mean of its divisors is an integer number (1384530).

Almost surely, 2^12856155 is an apocalyptic number.

12856155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12856155 is a deficient number, since it is larger than the sum of its proper divisors (9296325).

12856155 is a wasteful number, since it uses less digits than its factorization.

12856155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65950.

The product of its digits is 12000, while the sum is 33.

The square root of 12856155 is about 3585.5480752599. The cubic root of 12856155 is about 234.2629996427.

The spelling of 12856155 in words is "twelve million, eight hundred fifty-six thousand, one hundred fifty-five".