6540061 has 4 divisors (see below), whose sum is σ = 7134624. Its totient is φ = 5945500.

The previous prime is 6540029. The next prime is 6540067. The reversal of 6540061 is 1600456.

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 not a de Polignac number, because 6540061 - 2⁵ = 6540029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297265 + ... + 297286.

It is an arithmetic number, because the mean of its divisors is an integer number (1783656).

Almost surely, 2^6540061 is an apocalyptic number.

It is an amenable number.

6540061 is a deficient number, since it is larger than the sum of its proper divisors (594563).

6540061 is a wasteful number, since it uses less digits than its factorization.

6540061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594562.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6540061 is about 2557.3542969249. The cubic root of 6540061 is about 187.0081783149.

The spelling of 6540061 in words is "six million, five hundred forty thousand, sixty-one".