12428555 has 8 divisors (see below), whose sum is σ = 15062544. Its totient is φ = 9844000.

The previous prime is 12428543. The next prime is 12428557. The reversal of 12428555 is 55582421.

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

It is not a de Polignac number, because 12428555 - 2⁶ = 12428491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12428557) 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 7 ways as a sum of consecutive naturals, for example, 11801 + ... + 12810.

It is an arithmetic number, because the mean of its divisors is an integer number (1882818).

Almost surely, 2^12428555 is an apocalyptic number.

12428555 is a deficient number, since it is larger than the sum of its proper divisors (2633989).

12428555 is a wasteful number, since it uses less digits than its factorization.

12428555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24717.

The product of its digits is 16000, while the sum is 32.

The square root of 12428555 is about 3525.4155783397. The cubic root of 12428555 is about 231.6364388443.

The spelling of 12428555 in words is "twelve million, four hundred twenty-eight thousand, five hundred fifty-five".