6542769 has 4 divisors (see below), whose sum is σ = 8723696. Its totient is φ = 4361844.

The previous prime is 6542749. The next prime is 6542779. The reversal of 6542769 is 9672456.

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 6542769 - 2⁵ = 6542737 is a prime.

It is a super-2 number, since 2×6542769² = 85615652374722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

6542769 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6542749) 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, 1090459 + ... + 1090464.

It is an arithmetic number, because the mean of its divisors is an integer number (2180924).

Almost surely, 2^6542769 is an apocalyptic number.

It is an amenable number.

6542769 is a deficient number, since it is larger than the sum of its proper divisors (2180927).

6542769 is a wasteful number, since it uses less digits than its factorization.

6542769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180926.

The product of its digits is 90720, while the sum is 39.

The square root of 6542769 is about 2557.8836955577. The cubic root of 6542769 is about 187.0339858349.

The spelling of 6542769 in words is "six million, five hundred forty-two thousand, seven hundred sixty-nine".