881209 has 4 divisors (see below), whose sum is σ = 1007104. Its totient is φ = 755316.

The previous prime is 881207. The next prime is 881219. The reversal of 881209 is 902188.

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 881209 - 2¹ = 881207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (881207) 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, 62937 + ... + 62950.

It is an arithmetic number, because the mean of its divisors is an integer number (251776).

2⁸⁸¹²⁰⁹ is an apocalyptic number.

It is an amenable number.

881209 is a deficient number, since it is larger than the sum of its proper divisors (125895).

881209 is a wasteful number, since it uses less digits than its factorization.

881209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125894.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 881209 is about 938.7273299526. The cubic root of 881209 is about 95.8722621093.

The spelling of 881209 in words is "eight hundred eighty-one thousand, two hundred nine".