12151115 has 4 divisors (see below), whose sum is σ = 14581344. Its totient is φ = 9720888.

The previous prime is 12151103. The next prime is 12151147. The reversal of 12151115 is 51115121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12151115 - 2¹⁸ = 11888971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12151093 and 12151102.

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 3 ways as a sum of consecutive naturals, for example, 1215107 + ... + 1215116.

It is an arithmetic number, because the mean of its divisors is an integer number (3645336).

Almost surely, 2^12151115 is an apocalyptic number.

12151115 is a deficient number, since it is larger than the sum of its proper divisors (2430229).

12151115 is an equidigital number, since it uses as much as digits as its factorization.

12151115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430228.

The product of its digits is 50, while the sum is 17.

The square root of 12151115 is about 3485.8449477853. The cubic root of 12151115 is about 229.8998618899.

Adding to 12151115 its reverse (51115121), we get a palindrome (63266236).

The spelling of 12151115 in words is "twelve million, one hundred fifty-one thousand, one hundred fifteen".