12428 has 12 divisors (see below), whose sum is σ = 23520. Its totient is φ = 5712.

The previous prime is 12421. The next prime is 12433. The reversal of 12428 is 82421.

12428 = T₁₇ + T₁₈ + ... + T₄₂.

It is not an unprimeable number, because it can be changed into a prime (12421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 171.

It is an arithmetic number, because the mean of its divisors is an integer number (1960).

2¹²⁴²⁸ is an apocalyptic number.

It is an amenable number.

12428 is a deficient number, since it is larger than the sum of its proper divisors (11092).

12428 is a wasteful number, since it uses less digits than its factorization.

12428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 254 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 12428 is about 111.4809400750. The cubic root of 12428 is about 23.1632990867.

Adding to 12428 its reverse (82421), we get a palindrome (94849).

The spelling of 12428 in words is "twelve thousand, four hundred twenty-eight".