3755209 has 4 divisors (see below), whose sum is σ = 3826116. Its totient is φ = 3684304.

The previous prime is 3755203. The next prime is 3755237. The reversal of 3755209 is 9025573.

It is a happy number.

3755209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3027600 + 727609 = 1740^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 3755209 - 2⁹ = 3754697 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3755209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3755203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35374 + ... + 35479.

It is an arithmetic number, because the mean of its divisors is an integer number (956529).

Almost surely, 2^3755209 is an apocalyptic number.

It is an amenable number.

3755209 is a deficient number, since it is larger than the sum of its proper divisors (70907).

3755209 is an equidigital number, since it uses as much as digits as its factorization.

3755209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70906.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 3755209 is about 1937.8361643854. The cubic root of 3755209 is about 155.4335279005.

The spelling of 3755209 in words is "three million, seven hundred fifty-five thousand, two hundred nine".