12489161 has 6 divisors (see below), whose sum is σ = 13056330. Its totient is φ = 11945648.

The previous prime is 12489157. The next prime is 12489163. The reversal of 12489161 is 16198421.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 3822025 = 2944^2 + 1955^2 .

It is not a de Polignac number, because 12489161 - 2² = 12489157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12489163) 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 5 ways as a sum of consecutive naturals, for example, 11276 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (2176055).

Almost surely, 2^12489161 is an apocalyptic number.

It is an amenable number.

12489161 is a deficient number, since it is larger than the sum of its proper divisors (567169).

12489161 is an equidigital number, since it uses as much as digits as its factorization.

12489161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23655 (or 23632 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 12489161 is about 3534.0007074136. Note that the first 3 decimals coincide. The cubic root of 12489161 is about 232.0123420406.

The spelling of 12489161 in words is "twelve million, four hundred eighty-nine thousand, one hundred sixty-one".