12884257 has 4 divisors (see below), whose sum is σ = 12891460. Its totient is φ = 12877056.

The previous prime is 12884233. The next prime is 12884279. The reversal of 12884257 is 75248821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10784656 + 2099601 = 3284^2 + 1449^2 .

It is a cyclic number.

It is not a de Polignac number, because 12884257 - 2⁷ = 12884129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12884057) 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, 1369 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (3222865).

Almost surely, 2^12884257 is an apocalyptic number.

It is an amenable number.

12884257 is a deficient number, since it is larger than the sum of its proper divisors (7203).

12884257 is an equidigital number, since it uses as much as digits as its factorization.

12884257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202.

The product of its digits is 35840, while the sum is 37.

The square root of 12884257 is about 3589.4647233257. The cubic root of 12884257 is about 234.4335656192.

It can be divided in two parts, 1288 and 4257, that multiplied together give a triangular number (5483016 = T₃₃₁₁).

The spelling of 12884257 in words is "twelve million, eight hundred eighty-four thousand, two hundred fifty-seven".