12147089 has 4 divisors (see below), whose sum is σ = 12165360. Its totient is φ = 12128820.

The previous prime is 12147067. The next prime is 12147101. The reversal of 12147089 is 98074121.

12147089 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12147089 - 2²⁰ = 11098513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12147049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8099 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (3041340).

Almost surely, 2^12147089 is an apocalyptic number.

It is an amenable number.

12147089 is a deficient number, since it is larger than the sum of its proper divisors (18271).

12147089 is an equidigital number, since it uses as much as digits as its factorization.

12147089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18270.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12147089 is about 3485.2674215905. The cubic root of 12147089 is about 229.8744683606.

It can be divided in two parts, 121 and 47089, that multiplied together give a square (5697769 = 2387²).

The spelling of 12147089 in words is "twelve million, one hundred forty-seven thousand, eighty-nine".