260251021 has 2 divisors, whose sum is σ = 260251022. Its totient is φ = 260251020.

The previous prime is 260251001. The next prime is 260251051. The reversal of 260251021 is 120152062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232898121 + 27352900 = 15261^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 260251021 - 2¹¹ = 260248973 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260251021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260251001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130125510 + 130125511.

It is an arithmetic number, because the mean of its divisors is an integer number (130125511).

Almost surely, 2^260251021 is an apocalyptic number.

It is an amenable number.

260251021 is a deficient number, since it is larger than the sum of its proper divisors (1).

260251021 is an equidigital number, since it uses as much as digits as its factorization.

260251021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 260251021 is about 16132.2974495265. The cubic root of 260251021 is about 638.4557667172.

The spelling of 260251021 in words is "two hundred sixty million, two hundred fifty-one thousand, twenty-one".