6439459 has 4 divisors (see below), whose sum is σ = 6934816. Its totient is φ = 5944104.

The previous prime is 6439451. The next prime is 6439469. The reversal of 6439459 is 9549346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9549346 = 2 ⋅4774673.

It is a cyclic number.

It is not a de Polignac number, because 6439459 - 2³ = 6439451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439451) 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, 247659 + ... + 247684.

It is an arithmetic number, because the mean of its divisors is an integer number (1733704).

Almost surely, 2^6439459 is an apocalyptic number.

6439459 is a deficient number, since it is larger than the sum of its proper divisors (495357).

6439459 is a wasteful number, since it uses less digits than its factorization.

6439459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495356.

The product of its digits is 116640, while the sum is 40.

The square root of 6439459 is about 2537.6089139188. The cubic root of 6439459 is about 186.0443394505.

The spelling of 6439459 in words is "six million, four hundred thirty-nine thousand, four hundred fifty-nine".