241209 has 6 divisors (see below), whose sum is σ = 348426. Its totient is φ = 160800.

The previous prime is 241207. The next prime is 241229. The reversal of 241209 is 902142.

It can be written as a sum of positive squares in only one way, i.e., 189225 + 51984 = 435^2 + 228^2 .

It is not a de Polignac number, because 241209 - 2¹ = 241207 is a prime.

241209 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 241191 and 241200.

It is not an unprimeable number, because it can be changed into a prime (241207) 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 5 ways as a sum of consecutive naturals, for example, 13392 + ... + 13409.

It is an arithmetic number, because the mean of its divisors is an integer number (58071).

2²⁴¹²⁰⁹ is an apocalyptic number.

It is an amenable number.

241209 is a deficient number, since it is larger than the sum of its proper divisors (107217).

241209 is a wasteful number, since it uses less digits than its factorization.

241209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26807 (or 26804 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 241209 is about 491.1303289352. The cubic root of 241209 is about 62.2488266097.

The spelling of 241209 in words is "two hundred forty-one thousand, two hundred nine".