244921 has 4 divisors (see below), whose sum is σ = 246132. Its totient is φ = 243712.

The previous prime is 244901. The next prime is 244939. The reversal of 244921 is 129442.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 55696 = 435^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 244921 - 2⁵ = 244889 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 244892 and 244901.

It is not an unprimeable number, because it can be changed into a prime (244901) 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, 220 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (61533).

2²⁴⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

244921 is a deficient number, since it is larger than the sum of its proper divisors (1211).

244921 is an equidigital number, since it uses as much as digits as its factorization.

244921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its digits is 576, while the sum is 22.

The square root of 244921 is about 494.8949383455. The cubic root of 244921 is about 62.5665211738.

The spelling of 244921 in words is "two hundred forty-four thousand, nine hundred twenty-one".