12706215 has 32 divisors (see below), whose sum is σ = 21150720. Its totient is φ = 6509184.

The previous prime is 12706171. The next prime is 12706217. The reversal of 12706215 is 51260721.

12706215 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 12706215 - 2⁶ = 12706151 is a prime.

It is a super-2 number, since 2×12706215² = 322895799252450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12706217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47101 + ... + 47369.

It is an arithmetic number, because the mean of its divisors is an integer number (660960).

Almost surely, 2^12706215 is an apocalyptic number.

12706215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12706215 is a deficient number, since it is larger than the sum of its proper divisors (8444505).

12706215 is a wasteful number, since it uses less digits than its factorization.

12706215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12706215 is about 3564.5778151136. The cubic root of 12706215 is about 233.3487076038.

Adding to 12706215 its reverse (51260721), we get a palindrome (63966936).

It can be divided in two parts, 12706 and 215, that added together give a palindrome (12921).

The spelling of 12706215 in words is "twelve million, seven hundred six thousand, two hundred fifteen".