4521591 has 12 divisors (see below), whose sum is σ = 6610968. Its totient is φ = 2977584.

The previous prime is 4521557. The next prime is 4521599. The reversal of 4521591 is 1951254.

It is not a de Polignac number, because 4521591 - 2⁶ = 4521527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2280 + ... + 3773.

It is an arithmetic number, because the mean of its divisors is an integer number (550914).

Almost surely, 2^4521591 is an apocalyptic number.

4521591 is a deficient number, since it is larger than the sum of its proper divisors (2089377).

4521591 is a wasteful number, since it uses less digits than its factorization.

4521591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142 (or 6139 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 4521591 is about 2126.4033013518. The cubic root of 4521591 is about 165.3599853879.

The spelling of 4521591 in words is "four million, five hundred twenty-one thousand, five hundred ninety-one".