3261209 has 4 divisors (see below), whose sum is σ = 3727104. Its totient is φ = 2795316.

The previous prime is 3261197. The next prime is 3261211. The reversal of 3261209 is 9021623.

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 3261209 - 2²⁰ = 2212633 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (3261259) 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, 232937 + ... + 232950.

It is an arithmetic number, because the mean of its divisors is an integer number (931776).

Almost surely, 2^3261209 is an apocalyptic number.

It is an amenable number.

3261209 is a deficient number, since it is larger than the sum of its proper divisors (465895).

3261209 is an equidigital number, since it uses as much as digits as its factorization.

3261209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465894.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 3261209 is about 1805.8817790764. The cubic root of 3261209 is about 148.2948983728.

The spelling of 3261209 in words is "three million, two hundred sixty-one thousand, two hundred nine".