12142289 has 2 divisors, whose sum is σ = 12142290. Its totient is φ = 12142288.

The previous prime is 12142283. The next prime is 12142331. The reversal of 12142289 is 98224121.

12142289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 1690000 = 3233^2 + 1300^2 .

It is an emirp because it is prime and its reverse (98224121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12142289 - 2¹² = 12138193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12142283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071144 + 6071145.

It is an arithmetic number, because the mean of its divisors is an integer number (6071145).

Almost surely, 2^12142289 is an apocalyptic number.

It is an amenable number.

12142289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142289 is an equidigital number, since it uses as much as digits as its factorization.

12142289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 12142289 is about 3484.5787406801. The cubic root of 12142289 is about 229.8441855820.

The spelling of 12142289 in words is "twelve million, one hundred forty-two thousand, two hundred eighty-nine".