260255621 has 2 divisors, whose sum is σ = 260255622. Its totient is φ = 260255620.

The previous prime is 260255609. The next prime is 260255647. The reversal of 260255621 is 126552062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215766721 + 44488900 = 14689^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 260255621 - 2¹⁸ = 259993477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260252621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130127810 + 130127811.

It is an arithmetic number, because the mean of its divisors is an integer number (130127811).

Almost surely, 2^260255621 is an apocalyptic number.

It is an amenable number.

260255621 is a deficient number, since it is larger than the sum of its proper divisors (1).

260255621 is an equidigital number, since it uses as much as digits as its factorization.

260255621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 260255621 is about 16132.4400200342. The cubic root of 260255621 is about 638.4595283153.

The spelling of 260255621 in words is "two hundred sixty million, two hundred fifty-five thousand, six hundred twenty-one".