12856215 has 8 divisors (see below), whose sum is σ = 20569968. Its totient is φ = 6856640.

The previous prime is 12856211. The next prime is 12856219. The reversal of 12856215 is 51265821.

12856215 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 an interprime number because it is at equal distance from previous prime (12856211) and next prime (12856219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12856215 - 2² = 12856211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428526 + ... + 428555.

It is an arithmetic number, because the mean of its divisors is an integer number (2571246).

Almost surely, 2^12856215 is an apocalyptic number.

12856215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12856215 is a deficient number, since it is larger than the sum of its proper divisors (7713753).

12856215 is an equidigital number, since it uses as much as digits as its factorization.

12856215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857089.

The product of its digits is 4800, while the sum is 30.

The square root of 12856215 is about 3585.5564421718. The cubic root of 12856215 is about 234.2633640792.

The spelling of 12856215 in words is "twelve million, eight hundred fifty-six thousand, two hundred fifteen".