12428073 has 40 divisors (see below), whose sum is σ = 22163328. Its totient is φ = 6785856.

The previous prime is 12428051. The next prime is 12428077. The reversal of 12428073 is 37082421.

It is not a de Polignac number, because 12428073 - 2¹³ = 12419881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12428077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12565 + ... + 13517.

Almost surely, 2^12428073 is an apocalyptic number.

It is an amenable number.

12428073 is a deficient number, since it is larger than the sum of its proper divisors (9735255).

12428073 is an equidigital number, since it uses as much as digits as its factorization.

12428073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12428073 is about 3525.3472169419. The cubic root of 12428073 is about 231.6334443903.

The spelling of 12428073 in words is "twelve million, four hundred twenty-eight thousand, seventy-three".