12884421 has 8 divisors (see below), whose sum is σ = 18741024. Its totient is φ = 7808720.

The previous prime is 12884411. The next prime is 12884423. The reversal of 12884421 is 12448821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12884421 - 2¹⁰ = 12883397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12884423) 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 7 ways as a sum of consecutive naturals, for example, 195186 + ... + 195251.

It is an arithmetic number, because the mean of its divisors is an integer number (2342628).

Almost surely, 2^12884421 is an apocalyptic number.

12884421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12884421 is a deficient number, since it is larger than the sum of its proper divisors (5856603).

12884421 is a wasteful number, since it uses less digits than its factorization.

12884421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390451.

The product of its digits is 4096, while the sum is 30.

The square root of 12884421 is about 3589.4875678849. The cubic root of 12884421 is about 234.4345602941.

Subtracting from 12884421 its reverse (12448821), we obtain a square (435600 = 660²).

The spelling of 12884421 in words is "twelve million, eight hundred eighty-four thousand, four hundred twenty-one".