6547020121 has 8 divisors (see below), whose sum is σ = 6640691904. Its totient is φ = 6453389040.

The previous prime is 6547020101. The next prime is 6547020197. The reversal of 6547020121 is 1210207456.

6547020121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6547020121 - 2⁷ = 6547019993 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 6547020121.

It is not an unprimeable number, because it can be changed into a prime (6547020101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481995 + ... + 495391.

It is an arithmetic number, because the mean of its divisors is an integer number (830086488).

Almost surely, 2^6547020121 is an apocalyptic number.

It is an amenable number.

6547020121 is a deficient number, since it is larger than the sum of its proper divisors (93671783).

6547020121 is a wasteful number, since it uses less digits than its factorization.

6547020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20351.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 6547020121 is about 80913.6584329247. The cubic root of 6547020121 is about 1870.7448509768.

Adding to 6547020121 its reverse (1210207456), we get a palindrome (7757227577).

The spelling of 6547020121 in words is "six billion, five hundred forty-seven million, twenty thousand, one hundred twenty-one".