6512749 has 4 divisors (see below), whose sum is σ = 6795936. Its totient is φ = 6229564.

The previous prime is 6512747. The next prime is 6512767. The reversal of 6512749 is 9472156.

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 6512749 - 2¹ = 6512747 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 (6512741) 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, 141559 + ... + 141604.

It is an arithmetic number, because the mean of its divisors is an integer number (1698984).

Almost surely, 2^6512749 is an apocalyptic number.

It is an amenable number.

6512749 is a deficient number, since it is larger than the sum of its proper divisors (283187).

6512749 is a wasteful number, since it uses less digits than its factorization.

6512749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283186.

The product of its digits is 15120, while the sum is 34.

The square root of 6512749 is about 2552.0088165992. The cubic root of 6512749 is about 186.7474929877.

The spelling of 6512749 in words is "six million, five hundred twelve thousand, seven hundred forty-nine".