4290509 has 4 divisors (see below), whose sum is σ = 4371516. Its totient is φ = 4209504.

The previous prime is 4290499. The next prime is 4290529. The reversal of 4290509 is 9050924.

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 1974025 + 2316484 = 1405^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 4290509 - 2²⁰ = 3241933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4290529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40424 + ... + 40529.

It is an arithmetic number, because the mean of its divisors is an integer number (1092879).

Almost surely, 2^4290509 is an apocalyptic number.

It is an amenable number.

4290509 is a deficient number, since it is larger than the sum of its proper divisors (81007).

4290509 is an equidigital number, since it uses as much as digits as its factorization.

4290509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81006.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 4290509 is about 2071.3543878342. The cubic root of 4290509 is about 162.4936044820.

The spelling of 4290509 in words is "four million, two hundred ninety thousand, five hundred nine".