4045509 has 24 divisors (see below), whose sum is σ = 6394752. Its totient is φ = 2449440.

The previous prime is 4045501. The next prime is 4045523. The reversal of 4045509 is 9055404.

It is not a de Polignac number, because 4045509 - 2³ = 4045501 is a prime.

It is a super-2 number, since 2×4045509² = 32732286138162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8064 + ... + 8550.

It is an arithmetic number, because the mean of its divisors is an integer number (266448).

Almost surely, 2^4045509 is an apocalyptic number.

It is an amenable number.

4045509 is a deficient number, since it is larger than the sum of its proper divisors (2349243).

4045509 is a wasteful number, since it uses less digits than its factorization.

4045509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4045509 is about 2011.3450723334. The cubic root of 4045509 is about 159.3398450719.

It can be divided in two parts, 4045 and 509, that added together give a palindrome (4554).

The spelling of 4045509 in words is "four million, forty-five thousand, five hundred nine".