269921 has 4 divisors (see below), whose sum is σ = 275712. Its totient is φ = 264132.

The previous prime is 269897. The next prime is 269923. The reversal of 269921 is 129962.

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 269921 - 2¹⁰ = 268897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (269923) 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, 2825 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (68928).

2²⁶⁹⁹²¹ is an apocalyptic number.

It is an amenable number.

269921 is a deficient number, since it is larger than the sum of its proper divisors (5791).

269921 is an equidigital number, since it uses as much as digits as its factorization.

269921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790.

The product of its digits is 1944, while the sum is 29.

The square root of 269921 is about 519.5392189238. The cubic root of 269921 is about 64.6267363697.

The spelling of 269921 in words is "two hundred sixty-nine thousand, nine hundred twenty-one".