6749251 has 4 divisors (see below), whose sum is σ = 6800904. Its totient is φ = 6697600.

The previous prime is 6749213. The next prime is 6749261. The reversal of 6749251 is 1529476.

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

It is a cyclic number.

It is not a de Polignac number, because 6749251 - 2²¹ = 4652099 is a prime.

It is a super-3 number, since 3×6749251³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6749261) 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, 25630 + ... + 25891.

It is an arithmetic number, because the mean of its divisors is an integer number (1700226).

Almost surely, 2^6749251 is an apocalyptic number.

6749251 is a deficient number, since it is larger than the sum of its proper divisors (51653).

6749251 is a wasteful number, since it uses less digits than its factorization.

6749251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51652.

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

The square root of 6749251 is about 2597.9320622372. The cubic root of 6749251 is about 188.9811669970.

The spelling of 6749251 in words is "six million, seven hundred forty-nine thousand, two hundred fifty-one".