298921 has 4 divisors (see below), whose sum is σ = 341632. Its totient is φ = 256212.

The previous prime is 298897. The next prime is 298937. The reversal of 298921 is 129892.

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 298921 - 2⁹ = 298409 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

298921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (298021) 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, 21345 + ... + 21358.

It is an arithmetic number, because the mean of its divisors is an integer number (85408).

2²⁹⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

298921 is a deficient number, since it is larger than the sum of its proper divisors (42711).

298921 is an equidigital number, since it uses as much as digits as its factorization.

298921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42710.

The product of its digits is 2592, while the sum is 31.

The square root of 298921 is about 546.7366825081. The cubic root of 298921 is about 66.8629410230.

The spelling of 298921 in words is "two hundred ninety-eight thousand, nine hundred twenty-one".