12189249 has 6 divisors (see below), whose sum is σ = 17606706. Its totient is φ = 8126160.

The previous prime is 12189181. The next prime is 12189257. The reversal of 12189249 is 94298121.

It can be written as a sum of positive squares in only one way, i.e., 10284849 + 1904400 = 3207^2 + 1380^2 .

It is not a de Polignac number, because 12189249 - 2¹⁷ = 12058177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12189269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677172 + ... + 677189.

It is an arithmetic number, because the mean of its divisors is an integer number (2934451).

Almost surely, 2^12189249 is an apocalyptic number.

It is an amenable number.

12189249 is a deficient number, since it is larger than the sum of its proper divisors (5417457).

12189249 is a wasteful number, since it uses less digits than its factorization.

12189249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354367 (or 1354364 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 12189249 is about 3491.3104989388. The cubic root of 12189249 is about 230.1401099685.

The spelling of 12189249 in words is "twelve million, one hundred eighty-nine thousand, two hundred forty-nine".