12880561 has 4 divisors (see below), whose sum is σ = 12916800. Its totient is φ = 12844324.

The previous prime is 12880559. The next prime is 12880589. The reversal of 12880561 is 16508821.

12880561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16508821 = 7 ⋅2358403.

It is a cyclic number.

It is not a de Polignac number, because 12880561 - 2¹ = 12880559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12880501) 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, 17581 + ... + 18298.

It is an arithmetic number, because the mean of its divisors is an integer number (3229200).

Almost surely, 2^12880561 is an apocalyptic number.

It is an amenable number.

12880561 is a deficient number, since it is larger than the sum of its proper divisors (36239).

12880561 is an equidigital number, since it uses as much as digits as its factorization.

12880561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36238.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12880561 is about 3588.9498464035. The cubic root of 12880561 is about 234.4111468042.

The spelling of 12880561 in words is "twelve million, eight hundred eighty thousand, five hundred sixty-one".