4045591 has 4 divisors (see below), whose sum is σ = 4413384. Its totient is φ = 3677800.

The previous prime is 4045583. The next prime is 4045597. The reversal of 4045591 is 1955404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4045591 - 2³ = 4045583 is a prime.

It is a pancake number, because a pancake can be divided into 4045591 parts by 2844 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183880 + ... + 183901.

It is an arithmetic number, because the mean of its divisors is an integer number (1103346).

Almost surely, 2^4045591 is an apocalyptic number.

4045591 is a deficient number, since it is larger than the sum of its proper divisors (367793).

4045591 is a wasteful number, since it uses less digits than its factorization.

4045591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367792.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 4045591 is about 2011.3654565991. The cubic root of 4045591 is about 159.3409216385.

It can be divided in two parts, 404 and 5591, that added together give a palindrome (5995).

The spelling of 4045591 in words is "four million, forty-five thousand, five hundred ninety-one".