6749405 has 8 divisors (see below), whose sum is σ = 8722392. Its totient is φ = 4984128.

The previous prime is 6749401. The next prime is 6749411. The reversal of 6749405 is 5049476.

It can be written as a sum of positive squares in 4 ways, for example, as 267289 + 6482116 = 517^2 + 2546^2 .

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 6749405 - 2² = 6749401 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 (6749401) 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, 51854 + ... + 51983.

It is an arithmetic number, because the mean of its divisors is an integer number (1090299).

Almost surely, 2^6749405 is an apocalyptic number.

6749405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6749405 is a deficient number, since it is larger than the sum of its proper divisors (1972987).

6749405 is a wasteful number, since it uses less digits than its factorization.

6749405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103855.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 6749405 is about 2597.9617010264. The cubic root of 6749405 is about 188.9826043357.

The spelling of 6749405 in words is "six million, seven hundred forty-nine thousand, four hundred five".