12289155 has 16 divisors (see below), whose sum is σ = 19820544. Its totient is φ = 6501600.

The previous prime is 12289133. The next prime is 12289159. The reversal of 12289155 is 55198221.

12289155 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12289155 - 2¹⁸ = 12027011 is a prime.

It is a super-2 number, since 2×12289155² = 302046661228050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12289159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1321 + ... + 5130.

It is an arithmetic number, because the mean of its divisors is an integer number (1238784).

Almost surely, 2^12289155 is an apocalyptic number.

12289155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12289155 is a deficient number, since it is larger than the sum of its proper divisors (7531389).

12289155 is a wasteful number, since it uses less digits than its factorization.

12289155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586.

The product of its digits is 7200, while the sum is 33.

The square root of 12289155 is about 3505.5891088375. The cubic root of 12289155 is about 230.7671610498.

The spelling of 12289155 in words is "twelve million, two hundred eighty-nine thousand, one hundred fifty-five".