12106215 has 48 divisors (see below), whose sum is σ = 23546016. Its totient is φ = 5702400.

The previous prime is 12106201. The next prime is 12106217. The reversal of 12106215 is 51260121.

It is not a de Polignac number, because 12106215 - 2⁵ = 12106183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12106217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17985 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (490542).

Almost surely, 2^12106215 is an apocalyptic number.

12106215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12106215 is a deficient number, since it is larger than the sum of its proper divisors (11439801).

12106215 is a wasteful number, since it uses less digits than its factorization.

12106215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12106215 is about 3479.3986549402. The cubic root of 12106215 is about 229.6163421112.

Adding to 12106215 its reverse (51260121), we get a palindrome (63366336).

It can be divided in two parts, 12106 and 215, that added together give a palindrome (12321).

The spelling of 12106215 in words is "twelve million, one hundred six thousand, two hundred fifteen".