298581 has 4 divisors (see below), whose sum is σ = 398112. Its totient is φ = 199052.

The previous prime is 298579. The next prime is 298583. The reversal of 298581 is 185892.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (298579) and next prime (298583).

It is a cyclic number.

It is not a de Polignac number, because 298581 - 2¹ = 298579 is a prime.

It is a super-2 number, since 2×298581² = 178301227122, which contains 22 as substring.

It is a D-number.

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

298581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298583) 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, 49761 + ... + 49766.

It is an arithmetic number, because the mean of its divisors is an integer number (99528).

2²⁹⁸⁵⁸¹ is an apocalyptic number.

It is an amenable number.

298581 is a deficient number, since it is larger than the sum of its proper divisors (99531).

298581 is an equidigital number, since it uses as much as digits as its factorization.

298581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99530.

The product of its digits is 5760, while the sum is 33.

The square root of 298581 is about 546.4256582555. The cubic root of 298581 is about 66.8375808949.

The spelling of 298581 in words is "two hundred ninety-eight thousand, five hundred eighty-one".