6542761 has 4 divisors (see below), whose sum is σ = 6558724. Its totient is φ = 6526800.

The previous prime is 6542749. The next prime is 6542779. The reversal of 6542761 is 1672456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1946025 + 4596736 = 1395^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542761 - 2⁷ = 6542633 is a prime.

It is a Duffinian number.

6542761 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6542791) 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, 7350 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (1639681).

Almost surely, 2^6542761 is an apocalyptic number.

It is an amenable number.

6542761 is a deficient number, since it is larger than the sum of its proper divisors (15963).

6542761 is a wasteful number, since it uses less digits than its factorization.

6542761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15962.

The product of its digits is 10080, while the sum is 31.

The square root of 6542761 is about 2557.8821317645. The cubic root of 6542761 is about 187.0339096046.

The spelling of 6542761 in words is "six million, five hundred forty-two thousand, seven hundred sixty-one".