6720123 has 8 divisors (see below), whose sum is σ = 9061200. Its totient is φ = 4429568.

The previous prime is 6720089. The next prime is 6720143. The reversal of 6720123 is 3210276.

It is a happy number.

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 6720123 - 2⁶ = 6720059 is a prime.

It is a super-3 number, since 3×6720123³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6720123.

It is not an unprimeable number, because it can be changed into a prime (6720143) 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 7 ways as a sum of consecutive naturals, for example, 12318 + ... + 12851.

It is an arithmetic number, because the mean of its divisors is an integer number (1132650).

Almost surely, 2^6720123 is an apocalyptic number.

6720123 is a deficient number, since it is larger than the sum of its proper divisors (2341077).

6720123 is a wasteful number, since it uses less digits than its factorization.

6720123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25261.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 6720123 is about 2592.3200033946. The cubic root of 6720123 is about 188.7089105476.

Adding to 6720123 its reverse (3210276), we get a palindrome (9930399).

The spelling of 6720123 in words is "six million, seven hundred twenty thousand, one hundred twenty-three".