12106515 has 32 divisors (see below), whose sum is σ = 20632320. Its totient is φ = 6044544.

The previous prime is 12106459. The next prime is 12106531. The reversal of 12106515 is 51560121.

It is not a de Polignac number, because 12106515 - 2¹⁰ = 12105491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12106491 and 12106500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30297 + ... + 30693.

It is an arithmetic number, because the mean of its divisors is an integer number (644760).

Almost surely, 2^12106515 is an apocalyptic number.

12106515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12106515 is a deficient number, since it is larger than the sum of its proper divisors (8525805).

12106515 is a wasteful number, since it uses less digits than its factorization.

12106515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 12106515 is about 3479.4417655710. The cubic root of 12106515 is about 229.6182387770.

Adding to 12106515 its reverse (51560121), we get a palindrome (63666636).

It can be divided in two parts, 12106 and 515, that added together give a palindrome (12621).

The spelling of 12106515 in words is "twelve million, one hundred six thousand, five hundred fifteen".