244781 has 2 divisors, whose sum is σ = 244782. Its totient is φ = 244780.

The previous prime is 244759. The next prime is 244787. The reversal of 244781 is 187442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 111556 = 365^2 + 334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244781 is a prime.

It is a super-2 number, since 2×244781² = 119835475922, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 244781.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 244781.

It is not a weakly prime, because it can be changed into another prime (244787) 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, 122390 + 122391.

It is an arithmetic number, because the mean of its divisors is an integer number (122391).

2²⁴⁴⁷⁸¹ is an apocalyptic number.

It is an amenable number.

244781 is a deficient number, since it is larger than the sum of its proper divisors (1).

244781 is an equidigital number, since it uses as much as digits as its factorization.

244781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 26.

The square root of 244781 is about 494.7534739646. The cubic root of 244781 is about 62.5545976250.

The spelling of 244781 in words is "two hundred forty-four thousand, seven hundred eighty-one".