6751945 has 8 divisors (see below), whose sum is σ = 8321544. Its totient is φ = 5255424.

The previous prime is 6751939. The next prime is 6751957. The reversal of 6751945 is 5491576.

It can be written as a sum of positive squares in 4 ways, for example, as 4280761 + 2471184 = 2069^2 + 1572^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6751945 - 2¹³ = 6743753 is a prime.

It is a super-2 number, since 2×6751945² = 91177522566050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18064 + ... + 18433.

It is an arithmetic number, because the mean of its divisors is an integer number (1040193).

Almost surely, 2^6751945 is an apocalyptic number.

It is an amenable number.

6751945 is a deficient number, since it is larger than the sum of its proper divisors (1569599).

6751945 is a wasteful number, since it uses less digits than its factorization.

6751945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36539.

The product of its digits is 37800, while the sum is 37.

The square root of 6751945 is about 2598.4504998172. The cubic root of 6751945 is about 189.0063079369.

The spelling of 6751945 in words is "six million, seven hundred fifty-one thousand, nine hundred forty-five".