12811215 has 16 divisors (see below), whose sum is σ = 21159936. Its totient is φ = 6612000.

The previous prime is 12811189. The next prime is 12811223. The reversal of 12811215 is 51211821.

It is not a de Polignac number, because 12811215 - 2⁶ = 12811151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12811191 and 12811200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13311 + ... + 14240.

It is an arithmetic number, because the mean of its divisors is an integer number (1322496).

Almost surely, 2^12811215 is an apocalyptic number.

12811215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12811215 is a deficient number, since it is larger than the sum of its proper divisors (8348721).

12811215 is a wasteful number, since it uses less digits than its factorization.

12811215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27590.

The product of its digits is 160, while the sum is 21.

The square root of 12811215 is about 3579.2757647323. The cubic root of 12811215 is about 233.9897175699.

The spelling of 12811215 in words is "twelve million, eight hundred eleven thousand, two hundred fifteen".