6135921 has 12 divisors (see below), whose sum is σ = 9668880. Its totient is φ = 3718680.

The previous prime is 6135919. The next prime is 6135931. The reversal of 6135921 is 1295316.

6135921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6135921 - 2¹ = 6135919 is a prime.

6135921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6135901) 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 11 ways as a sum of consecutive naturals, for example, 30891 + ... + 31088.

It is an arithmetic number, because the mean of its divisors is an integer number (805740).

Almost surely, 2^6135921 is an apocalyptic number.

It is an amenable number.

6135921 is a deficient number, since it is larger than the sum of its proper divisors (3532959).

6135921 is a wasteful number, since it uses less digits than its factorization.

6135921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61996 (or 61993 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 6135921 is about 2477.0791267136. The cubic root of 6135921 is about 183.0739645471.

It can be divided in two parts, 6135 and 921, that added together give a square (7056 = 84²).

The spelling of 6135921 in words is "six million, one hundred thirty-five thousand, nine hundred twenty-one".