6426239 has 4 divisors (see below), whose sum is σ = 6442824. Its totient is φ = 6409656.

The previous prime is 6426229. The next prime is 6426241. The reversal of 6426239 is 9326246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6426239 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426229) 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 3 ways as a sum of consecutive naturals, for example, 7697 + ... + 8490.

It is an arithmetic number, because the mean of its divisors is an integer number (1610706).

Almost surely, 2^6426239 is an apocalyptic number.

6426239 is a deficient number, since it is larger than the sum of its proper divisors (16585).

6426239 is a wasteful number, since it uses less digits than its factorization.

6426239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16584.

The product of its digits is 15552, while the sum is 32.

The square root of 6426239 is about 2535.0027613397. The cubic root of 6426239 is about 185.9169378999.

The spelling of 6426239 in words is "six million, four hundred twenty-six thousand, two hundred thirty-nine".