6745549 has 8 divisors (see below), whose sum is σ = 7172280. Its totient is φ = 6344128.

The previous prime is 6745523. The next prime is 6745553. The reversal of 6745549 is 9455476.

It can be written as a sum of positive squares in 4 ways, for example, as 3348900 + 3396649 = 1830^2 + 1843^2 .

It is not a de Polignac number, because 6745549 - 2⁵ = 6745517 is a prime.

It is a super-2 number, since 2×6745549² = 91004862622802, which contains 22 as substring.

It is a Duffinian number.

6745549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 5599.

It is an arithmetic number, because the mean of its divisors is an integer number (896535).

Almost surely, 2^6745549 is an apocalyptic number.

It is an amenable number.

6745549 is a deficient number, since it is larger than the sum of its proper divisors (426731).

6745549 is an equidigital number, since it uses as much as digits as its factorization.

6745549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1390 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 6745549 is about 2597.2194747460. The cubic root of 6745549 is about 188.9466082866.

The spelling of 6745549 in words is "six million, seven hundred forty-five thousand, five hundred forty-nine".