6509161 has 4 divisors (see below), whose sum is σ = 6792192. Its totient is φ = 6226132.

The previous prime is 6509143. The next prime is 6509177. The reversal of 6509161 is 1619056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6509161 - 2⁷ = 6509033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6500161) 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, 141481 + ... + 141526.

It is an arithmetic number, because the mean of its divisors is an integer number (1698048).

Almost surely, 2^6509161 is an apocalyptic number.

It is an amenable number.

6509161 is a deficient number, since it is larger than the sum of its proper divisors (283031).

6509161 is a wasteful number, since it uses less digits than its factorization.

6509161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283030.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 6509161 is about 2551.3057441240. The cubic root of 6509161 is about 186.7131924135.

It can be divided in two parts, 6509 and 161, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 6509161 in words is "six million, five hundred nine thousand, one hundred sixty-one".