12126784 has 28 divisors (see below), whose sum is σ = 24345900. Its totient is φ = 5992448.

The previous prime is 12126761. The next prime is 12126791. The reversal of 12126784 is 48762121.

It can be written as a sum of positive squares in 2 ways, for example, as 2689600 + 9437184 = 1640^2 + 3072^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632 + ... + 6760.

Almost surely, 2^12126784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12126784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12172950).

12126784 is an abundant number, since it is smaller than the sum of its proper divisors (12219116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12126784 is an equidigital number, since it uses as much as digits as its factorization.

12126784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2220 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 12126784 is about 3482.3532273450. The cubic root of 12126784 is about 229.7463113381.

The spelling of 12126784 in words is "twelve million, one hundred twenty-six thousand, seven hundred eighty-four".