4245509 has 4 divisors (see below), whose sum is σ = 4349100. Its totient is φ = 4141920.

The previous prime is 4245499. The next prime is 4245511. The reversal of 4245509 is 9055424.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 624100 + 3621409 = 790^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 4245509 - 2²⁰ = 3196933 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4245599) 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, 51734 + ... + 51815.

It is an arithmetic number, because the mean of its divisors is an integer number (1087275).

Almost surely, 2^4245509 is an apocalyptic number.

It is an amenable number.

4245509 is a deficient number, since it is larger than the sum of its proper divisors (103591).

4245509 is a wasteful number, since it uses less digits than its factorization.

4245509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103590.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 4245509 is about 2060.4632974164. The cubic root of 4245509 is about 161.9235146744.

The spelling of 4245509 in words is "four million, two hundred forty-five thousand, five hundred nine".