4345509 has 16 divisors (see below), whose sum is σ = 6970880. Its totient is φ = 2352240.

The previous prime is 4345493. The next prime is 4345511. The reversal of 4345509 is 9055434.

It is not a de Polignac number, because 4345509 - 2⁴ = 4345493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4345529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5047 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (435680).

Almost surely, 2^4345509 is an apocalyptic number.

It is an amenable number.

4345509 is a deficient number, since it is larger than the sum of its proper divisors (2625371).

4345509 is a wasteful number, since it uses less digits than its factorization.

4345509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10920.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 4345509 is about 2084.5884485912. The cubic root of 4345509 is about 163.1849932736.

The spelling of 4345509 in words is "four million, three hundred forty-five thousand, five hundred nine".