6428243 has 4 divisors (see below), whose sum is σ = 6434520. Its totient is φ = 6421968.

The previous prime is 6428207. The next prime is 6428263. The reversal of 6428243 is 3428246.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6428243 - 2⁸ = 6427987 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 4⁴ + 2⁷ + 8⁷ + 2¹³ + 4¹⁰ + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6428263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205 + ... + 3782.

It is an arithmetic number, because the mean of its divisors is an integer number (1608630).

Almost surely, 2^6428243 is an apocalyptic number.

6428243 is a deficient number, since it is larger than the sum of its proper divisors (6277).

6428243 is a wasteful number, since it uses less digits than its factorization.

6428243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276.

The product of its digits is 9216, while the sum is 29.

The square root of 6428243 is about 2535.3979963706. The cubic root of 6428243 is about 185.9362617388.

The spelling of 6428243 in words is "six million, four hundred twenty-eight thousand, two hundred forty-three".