4213509 has 4 divisors (see below), whose sum is σ = 5618016. Its totient is φ = 2809004.

The previous prime is 4213483. The next prime is 4213519. The reversal of 4213509 is 9053124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4213509 - 2¹³ = 4205317 is a prime.

It is a D-number.

4213509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4213519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702249 + ... + 702254.

It is an arithmetic number, because the mean of its divisors is an integer number (1404504).

Almost surely, 2^4213509 is an apocalyptic number.

It is an amenable number.

4213509 is a deficient number, since it is larger than the sum of its proper divisors (1404507).

4213509 is a wasteful number, since it uses less digits than its factorization.

4213509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404506.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 4213509 is about 2052.6833657435. The cubic root of 4213509 is about 161.5156620709.

The spelling of 4213509 in words is "four million, two hundred thirteen thousand, five hundred nine".