12880445 has 4 divisors (see below), whose sum is σ = 15456540. Its totient is φ = 10304352.

The previous prime is 12880411. The next prime is 12880447. The reversal of 12880445 is 54408821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54408821 = 157 ⋅346553.

It can be written as a sum of positive squares in 2 ways, for example, as 10252804 + 2627641 = 3202^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 12880445 - 2¹² = 12876349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880447) 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 3 ways as a sum of consecutive naturals, for example, 1288040 + ... + 1288049.

It is an arithmetic number, because the mean of its divisors is an integer number (3864135).

Almost surely, 2^12880445 is an apocalyptic number.

It is an amenable number.

12880445 is a deficient number, since it is larger than the sum of its proper divisors (2576095).

12880445 is an equidigital number, since it uses as much as digits as its factorization.

12880445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576094.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 12880445 is about 3588.9336856509. The cubic root of 12880445 is about 234.4104431140.

The spelling of 12880445 in words is "twelve million, eight hundred eighty thousand, four hundred forty-five".