12890345 has 8 divisors (see below), whose sum is σ = 16658376. Its totient is φ = 9518976.

The previous prime is 12890323. The next prime is 12890363. The reversal of 12890345 is 54309821.

It can be written as a sum of positive squares in 4 ways, for example, as 724201 + 12166144 = 851^2 + 3488^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12890345 - 2²² = 8696041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99092 + ... + 99221.

It is an arithmetic number, because the mean of its divisors is an integer number (2082297).

Almost surely, 2^12890345 is an apocalyptic number.

It is an amenable number.

12890345 is a deficient number, since it is larger than the sum of its proper divisors (3768031).

12890345 is a wasteful number, since it uses less digits than its factorization.

12890345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198331.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 12890345 is about 3590.3126604796. The cubic root of 12890345 is about 234.4704842352.

The spelling of 12890345 in words is "twelve million, eight hundred ninety thousand, three hundred forty-five".