6540121 has 8 divisors (see below), whose sum is σ = 7914240. Its totient is φ = 5275968.

The previous prime is 6540103. The next prime is 6540133. The reversal of 6540121 is 1210456.

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 6540121 - 2¹¹ = 6538073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540181) 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, 27361 + ... + 27598.

It is an arithmetic number, because the mean of its divisors is an integer number (989280).

Almost surely, 2^6540121 is an apocalyptic number.

It is an amenable number.

6540121 is a deficient number, since it is larger than the sum of its proper divisors (1374119).

6540121 is a wasteful number, since it uses less digits than its factorization.

6540121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54983.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 6540121 is about 2557.3660277715. The cubic root of 6540121 is about 187.0087501982.

Adding to 6540121 its reverse (1210456), we get a palindrome (7750577).

It can be divided in two parts, 65 and 40121, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 6540121 in words is "six million, five hundred forty thousand, one hundred twenty-one".