6720291 has 12 divisors (see below), whose sum is σ = 9729720. Its totient is φ = 4469760.

The previous prime is 6720289. The next prime is 6720299. The reversal of 6720291 is 1920276.

It is not a de Polignac number, because 6720291 - 2¹ = 6720289 is a prime.

It is a super-2 number, since 2×6720291² = 90324622249362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6720299) 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 11 ways as a sum of consecutive naturals, for example, 6436 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (810810).

Almost surely, 2^6720291 is an apocalyptic number.

6720291 is a deficient number, since it is larger than the sum of its proper divisors (3009429).

6720291 is a wasteful number, since it uses less digits than its factorization.

6720291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 6720291 is about 2592.3524065991. The cubic root of 6720291 is about 188.7104830800.

The spelling of 6720291 in words is "six million, seven hundred twenty thousand, two hundred ninety-one".