6720249 has 4 divisors (see below), whose sum is σ = 8960336. Its totient is φ = 4480164.

The previous prime is 6720239. The next prime is 6720251. The reversal of 6720249 is 9420276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6720249 - 2¹² = 6716153 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6720229) 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, 1120039 + ... + 1120044.

It is an arithmetic number, because the mean of its divisors is an integer number (2240084).

Almost surely, 2^6720249 is an apocalyptic number.

It is an amenable number.

6720249 is a deficient number, since it is larger than the sum of its proper divisors (2240087).

6720249 is a wasteful number, since it uses less digits than its factorization.

6720249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240086.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 6720249 is about 2592.3443058359. The cubic root of 6720249 is about 188.7100899494.

The spelling of 6720249 in words is "six million, seven hundred twenty thousand, two hundred forty-nine".