6521291 has 8 divisors (see below), whose sum is σ = 7492320. Its totient is φ = 5560128.

The previous prime is 6521269. The next prime is 6521293. The reversal of 6521291 is 1921256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6521291 - 2¹⁴ = 6504907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6521291.

It is not an unprimeable number, because it can be changed into a prime (6521293) 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 7 ways as a sum of consecutive naturals, for example, 986 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (936540).

Almost surely, 2^6521291 is an apocalyptic number.

6521291 is a deficient number, since it is larger than the sum of its proper divisors (971029).

6521291 is a wasteful number, since it uses less digits than its factorization.

6521291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933.

The product of its digits is 1080, while the sum is 26.

The square root of 6521291 is about 2553.6818517584. The cubic root of 6521291 is about 186.8291021608.

The spelling of 6521291 in words is "six million, five hundred twenty-one thousand, two hundred ninety-one".