12785289 has 8 divisors (see below), whose sum is σ = 18596832. Its totient is φ = 7748640.

The previous prime is 12785273. The next prime is 12785303. The reversal of 12785289 is 98258721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12785289 - 2⁴ = 12785273 is a prime.

It is a super-2 number, since 2×12785289² = 326927229627042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12785289.

It is not an unprimeable number, because it can be changed into a prime (12785209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193684 + ... + 193749.

It is an arithmetic number, because the mean of its divisors is an integer number (2324604).

Almost surely, 2^12785289 is an apocalyptic number.

It is an amenable number.

12785289 is a deficient number, since it is larger than the sum of its proper divisors (5811543).

12785289 is a wasteful number, since it uses less digits than its factorization.

12785289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387447.

The product of its digits is 80640, while the sum is 42.

The square root of 12785289 is about 3575.6522481919. The cubic root of 12785289 is about 233.8317696517.

The spelling of 12785289 in words is "twelve million, seven hundred eighty-five thousand, two hundred eighty-nine".