6534139 has 4 divisors (see below), whose sum is σ = 6818256. Its totient is φ = 6250024.

The previous prime is 6534133. The next prime is 6534173. The reversal of 6534139 is 9314356.

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 6534139 - 2³ = 6534131 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

6534139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6534139.

It is not an unprimeable number, because it can be changed into a prime (6534131) 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, 142024 + ... + 142069.

It is an arithmetic number, because the mean of its divisors is an integer number (1704564).

Almost surely, 2^6534139 is an apocalyptic number.

6534139 is a deficient number, since it is larger than the sum of its proper divisors (284117).

6534139 is a wasteful number, since it uses less digits than its factorization.

6534139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284116.

The product of its digits is 9720, while the sum is 31.

The square root of 6534139 is about 2556.1961974778. The cubic root of 6534139 is about 186.9517162081.

The spelling of 6534139 in words is "six million, five hundred thirty-four thousand, one hundred thirty-nine".