6108721 has 4 divisors (see below), whose sum is σ = 6131700. Its totient is φ = 6085744.

The previous prime is 6108691. The next prime is 6108743. The reversal of 6108721 is 1278016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 5948721 = 400^2 + 2439^2 .

It is a cyclic number.

It is not a de Polignac number, because 6108721 - 2⁵ = 6108689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6108761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11086 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (1532925).

Almost surely, 2^6108721 is an apocalyptic number.

It is an amenable number.

6108721 is a deficient number, since it is larger than the sum of its proper divisors (22979).

6108721 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 6108721 = (2067181)₁₂.

6108721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22978.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 6108721 is about 2471.5826913134. The cubic root of 6108721 is about 182.8030468874.

The spelling of 6108721 in words is "six million, one hundred eight thousand, seven hundred twenty-one".