12115554 has 16 divisors (see below), whose sum is σ = 26434080. Its totient is φ = 3671360.

The previous prime is 12115553. The next prime is 12115561. The reversal of 12115554 is 45551121.

It is not an unprimeable number, because it can be changed into a prime (12115553) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 91719 + ... + 91850.

It is an arithmetic number, because the mean of its divisors is an integer number (1652130).

Almost surely, 2^12115554 is an apocalyptic number.

12115554 is an abundant number, since it is smaller than the sum of its proper divisors (14318526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12115554 is a wasteful number, since it uses less digits than its factorization.

12115554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183585.

The product of its digits is 1000, while the sum is 24.

The square root of 12115554 is about 3480.7404384700. The cubic root of 12115554 is about 229.6753706307.

Adding to 12115554 its reverse (45551121), we get a palindrome (57666675).

The spelling of 12115554 in words is "twelve million, one hundred fifteen thousand, five hundred fifty-four".