298621 has 2 divisors, whose sum is σ = 298622. Its totient is φ = 298620.

The previous prime is 298607. The next prime is 298631. The reversal of 298621 is 126892.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290521 + 8100 = 539^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 298621 - 2⁵ = 298589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 298621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298601) 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 as a sum of consecutive naturals, namely, 149310 + 149311.

It is an arithmetic number, because the mean of its divisors is an integer number (149311).

2²⁹⁸⁶²¹ is an apocalyptic number.

298621 is the 316-th hex number.

It is an amenable number.

298621 is a deficient number, since it is larger than the sum of its proper divisors (1).

298621 is an equidigital number, since it uses as much as digits as its factorization.

298621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 298621 is about 546.4622585321. The cubic root of 298621 is about 66.8405654383.

It can be divided in two parts, 298 and 621, that added together give a palindrome (919).

The spelling of 298621 in words is "two hundred ninety-eight thousand, six hundred twenty-one".