6591921 has 12 divisors (see below), whose sum is σ = 10224432. Its totient is φ = 3766728.

The previous prime is 6591913. The next prime is 6591941. The reversal of 6591921 is 1291956.

It is not a de Polignac number, because 6591921 - 2³ = 6591913 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6591941) 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, 22275 + ... + 22568.

It is an arithmetic number, because the mean of its divisors is an integer number (852036).

Almost surely, 2^6591921 is an apocalyptic number.

It is an amenable number.

6591921 is a deficient number, since it is larger than the sum of its proper divisors (3632511).

6591921 is a wasteful number, since it uses less digits than its factorization.

6591921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44860 (or 44853 counting only the distinct ones).

The product of its digits is 4860, while the sum is 33.

The square root of 6591921 is about 2567.4736610139. The cubic root of 6591921 is about 187.5011768815.

The spelling of 6591921 in words is "six million, five hundred ninety-one thousand, nine hundred twenty-one".