248621 has 2 divisors, whose sum is σ = 248622. Its totient is φ = 248620.

The previous prime is 248609. The next prime is 248627. The reversal of 248621 is 126842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212521 + 36100 = 461^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248621 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248627) 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, 124310 + 124311.

It is an arithmetic number, because the mean of its divisors is an integer number (124311).

2²⁴⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

248621 is a deficient number, since it is larger than the sum of its proper divisors (1).

248621 is an equidigital number, since it uses as much as digits as its factorization.

248621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 248621 is about 498.6190930961. The cubic root of 248621 is about 62.8800101274.

The spelling of 248621 in words is "two hundred forty-eight thousand, six hundred twenty-one".