6442759 has 4 divisors (see below), whose sum is σ = 6548440. Its totient is φ = 6337080.

The previous prime is 6442721. The next prime is 6442763. The reversal of 6442759 is 9572446.

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

It is a cyclic number.

It is not a de Polignac number, because 6442759 - 2¹³ = 6434567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52749 + ... + 52870.

It is an arithmetic number, because the mean of its divisors is an integer number (1637110).

Almost surely, 2^6442759 is an apocalyptic number.

6442759 is a deficient number, since it is larger than the sum of its proper divisors (105681).

6442759 is a wasteful number, since it uses less digits than its factorization.

6442759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105680.

The product of its digits is 60480, while the sum is 37.

The square root of 6442759 is about 2538.2590490334. The cubic root of 6442759 is about 186.0761144529.

It can be divided in two parts, 644 and 2759, that added together give a triangular number (3403 = T₈₂).

The spelling of 6442759 in words is "six million, four hundred forty-two thousand, seven hundred fifty-nine".