4055209 has 4 divisors (see below), whose sum is σ = 4074640. Its totient is φ = 4035780.

The previous prime is 4055179. The next prime is 4055221. The reversal of 4055209 is 9025504.

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 4055209 - 2¹⁵ = 4022441 is a prime.

It is a Duffinian number.

4055209 is a lucky number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (4050209) 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, 9399 + ... + 9820.

It is an arithmetic number, because the mean of its divisors is an integer number (1018660).

Almost surely, 2^4055209 is an apocalyptic number.

It is an amenable number.

4055209 is a deficient number, since it is larger than the sum of its proper divisors (19431).

4055209 is a wasteful number, since it uses less digits than its factorization.

4055209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 4055209 is about 2013.7549503353. The cubic root of 4055209 is about 159.4670942296.

The spelling of 4055209 in words is "four million, fifty-five thousand, two hundred nine".