12428641 has 8 divisors (see below), whose sum is σ = 13164480. Its totient is φ = 11701008.

The previous prime is 12428639. The next prime is 12428657. The reversal of 12428641 is 14682421.

12428641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12428641 - 2¹ = 12428639 is a prime.

It is a super-2 number, since 2×12428641² = 308942234213762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12428681) 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, 1215 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (1645560).

Almost surely, 2^12428641 is an apocalyptic number.

It is an amenable number.

12428641 is a deficient number, since it is larger than the sum of its proper divisors (735839).

12428641 is a wasteful number, since it uses less digits than its factorization.

12428641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4103.

The product of its digits is 3072, while the sum is 28.

The square root of 12428641 is about 3525.4277754621. The cubic root of 12428641 is about 231.6369731163.

The spelling of 12428641 in words is "twelve million, four hundred twenty-eight thousand, six hundred forty-one".