12869281 has 8 divisors (see below), whose sum is σ = 13091624. Its totient is φ = 12648960.

The previous prime is 12869273. The next prime is 12869299. The reversal of 12869281 is 18296821.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 11390625 = 1216^2 + 3375^2 .

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 12869281 - 2³ = 12869273 is a prime.

It is a super-2 number, since 2×12869281² = 331236786913922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12869281.

It is not an unprimeable number, because it can be changed into a prime (12869201) by changing a digit.

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, 17191 + ... + 17923.

It is an arithmetic number, because the mean of its divisors is an integer number (1636453).

Almost surely, 2^12869281 is an apocalyptic number.

It is an amenable number.

12869281 is a deficient number, since it is larger than the sum of its proper divisors (222343).

12869281 is an equidigital number, since it uses as much as digits as its factorization.

12869281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011.

The product of its digits is 13824, while the sum is 37.

The square root of 12869281 is about 3587.3780118633. The cubic root of 12869281 is about 234.3426992168.

The spelling of 12869281 in words is "twelve million, eight hundred sixty-nine thousand, two hundred eighty-one".