12811115 has 16 divisors (see below), whose sum is σ = 16987968. Its totient is φ = 9225216.

The previous prime is 12811109. The next prime is 12811151. The reversal of 12811115 is 51111821.

It is a cyclic number.

It is not a de Polignac number, because 12811115 - 2¹² = 12807019 is a prime.

It is a Duffinian 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, 1322 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (1061748).

Almost surely, 2^12811115 is an apocalyptic number.

12811115 is a deficient number, since it is larger than the sum of its proper divisors (4176853).

12811115 is a wasteful number, since it uses less digits than its factorization.

12811115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598.

The product of its digits is 80, while the sum is 20.

The square root of 12811115 is about 3579.2617953986. The cubic root of 12811115 is about 233.9891087536.

Adding to 12811115 its reverse (51111821), we get a palindrome (63922936).

The spelling of 12811115 in words is "twelve million, eight hundred eleven thousand, one hundred fifteen".