12887045 has 4 divisors (see below), whose sum is σ = 15464460. Its totient is φ = 10309632.

The previous prime is 12887029. The next prime is 12887047. The reversal of 12887045 is 54078821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54078821 = 43 ⋅1257647.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 7059649 = 2414^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 12887045 - 2⁴ = 12887029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12886996 and 12887014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887047) 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, 1288700 + ... + 1288709.

It is an arithmetic number, because the mean of its divisors is an integer number (3866115).

Almost surely, 2^12887045 is an apocalyptic number.

It is an amenable number.

12887045 is a deficient number, since it is larger than the sum of its proper divisors (2577415).

12887045 is an equidigital number, since it uses as much as digits as its factorization.

12887045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577414.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 12887045 is about 3589.8530610597. The cubic root of 12887045 is about 234.4504739450.

The spelling of 12887045 in words is "twelve million, eight hundred eighty-seven thousand, forty-five".