12115856 has 10 divisors (see below), whose sum is σ = 23474502. Its totient is φ = 6057920.

The previous prime is 12115819. The next prime is 12115861. The reversal of 12115856 is 65851121.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 3936256 = 2860^2 + 1984^2 .

It is a super-2 number, since 2×12115856² = 293587933225472, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 378605 + ... + 378636.

Almost surely, 2^12115856 is an apocalyptic number.

12115856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12115856 is a deficient number, since it is larger than the sum of its proper divisors (11358646).

12115856 is an equidigital number, since it uses as much as digits as its factorization.

12115856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757249 (or 757243 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 12115856 is about 3480.7838197739. The cubic root of 12115856 is about 229.6772789596.

Adding to 12115856 its reverse (65851121), we get a palindrome (77966977).

The spelling of 12115856 in words is "twelve million, one hundred fifteen thousand, eight hundred fifty-six".