6536491 has 4 divisors (see below), whose sum is σ = 7039312. Its totient is φ = 6033672.

The previous prime is 6536489. The next prime is 6536503. The reversal of 6536491 is 1946356.

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 6536491 - 2¹ = 6536489 is a prime.

It is a Duffinian number.

6536491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6536441) 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, 251391 + ... + 251416.

It is an arithmetic number, because the mean of its divisors is an integer number (1759828).

Almost surely, 2^6536491 is an apocalyptic number.

6536491 is a deficient number, since it is larger than the sum of its proper divisors (502821).

6536491 is a wasteful number, since it uses less digits than its factorization.

6536491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502820.

The product of its digits is 19440, while the sum is 34.

The square root of 6536491 is about 2556.6562146679. The cubic root of 6536491 is about 186.9741449569.

The spelling of 6536491 in words is "six million, five hundred thirty-six thousand, four hundred ninety-one".