12884557 has 4 divisors (see below), whose sum is σ = 14725216. Its totient is φ = 11043900.

The previous prime is 12884549. The next prime is 12884567. The reversal of 12884557 is 75548821.

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: 75548821 = 5233 ⋅14437.

It is not a de Polignac number, because 12884557 - 2³ = 12884549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12884507) 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, 920319 + ... + 920332.

It is an arithmetic number, because the mean of its divisors is an integer number (3681304).

Almost surely, 2^12884557 is an apocalyptic number.

It is an amenable number.

12884557 is a deficient number, since it is larger than the sum of its proper divisors (1840659).

12884557 is an equidigital number, since it uses as much as digits as its factorization.

12884557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840658.

The product of its digits is 89600, while the sum is 40.

The square root of 12884557 is about 3589.5065120431. The cubic root of 12884557 is about 234.4353851401.

The spelling of 12884557 in words is "twelve million, eight hundred eighty-four thousand, five hundred fifty-seven".