6720101 has 4 divisors (see below), whose sum is σ = 6725292. Its totient is φ = 6714912.

The previous prime is 6720089. The next prime is 6720143. The reversal of 6720101 is 1010276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5452225 + 1267876 = 2335^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 6720101 - 2¹⁰ = 6719077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6720101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720191) 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 3 ways as a sum of consecutive naturals, for example, 1121 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (1681323).

Almost surely, 2^6720101 is an apocalyptic number.

It is an amenable number.

6720101 is a deficient number, since it is larger than the sum of its proper divisors (5191).

6720101 is a wasteful number, since it uses less digits than its factorization.

6720101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5190.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 6720101 is about 2592.3157600879. The cubic root of 6720101 is about 188.7087046188.

Adding to 6720101 its reverse (1010276), we get a palindrome (7730377).

The spelling of 6720101 in words is "six million, seven hundred twenty thousand, one hundred one".