12758869 has 4 divisors (see below), whose sum is σ = 13198860. Its totient is φ = 12318880.

The previous prime is 12758839. The next prime is 12758873. The reversal of 12758869 is 96885721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96885721 = 37 ⋅2618533.

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 7628644 = 2265^2 + 2762^2 .

It is a cyclic number.

It is not a de Polignac number, because 12758869 - 2⁷ = 12758741 is a prime.

It is a super-2 number, since 2×12758869² = 325577476318322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12758839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219952 + ... + 220009.

It is an arithmetic number, because the mean of its divisors is an integer number (3299715).

Almost surely, 2^12758869 is an apocalyptic number.

It is an amenable number.

12758869 is a deficient number, since it is larger than the sum of its proper divisors (439991).

12758869 is an equidigital number, since it uses as much as digits as its factorization.

12758869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439990.

The product of its digits is 241920, while the sum is 46.

The square root of 12758869 is about 3571.9559067827. The cubic root of 12758869 is about 233.6705923378.

It can be divided in two parts, 127 and 58869, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 12758869 in words is "twelve million, seven hundred fifty-eight thousand, eight hundred sixty-nine".