4312591 has 4 divisors (see below), whose sum is σ = 4317712. Its totient is φ = 4307472.

The previous prime is 4312571. The next prime is 4312631. The reversal of 4312591 is 1952134.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4312591 - 2⁵ = 4312559 is a prime.

It is a super-2 number, since 2×4312591² = 37196882266562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312501) 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 3 ways as a sum of consecutive naturals, for example, 966 + ... + 3091.

It is an arithmetic number, because the mean of its divisors is an integer number (1079428).

Almost surely, 2^4312591 is an apocalyptic number.

4312591 is a deficient number, since it is larger than the sum of its proper divisors (5121).

4312591 is a wasteful number, since it uses less digits than its factorization.

4312591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120.

The product of its digits is 1080, while the sum is 25.

The square root of 4312591 is about 2076.6778758392. The cubic root of 4312591 is about 162.7718966797.

The spelling of 4312591 in words is "four million, three hundred twelve thousand, five hundred ninety-one".