259867121 has 2 divisors, whose sum is σ = 259867122. Its totient is φ = 259867120.

The previous prime is 259867099. The next prime is 259867159. The reversal of 259867121 is 121768952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211411600 + 48455521 = 14540^2 + 6961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259867121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259860121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129933560 + 129933561.

It is an arithmetic number, because the mean of its divisors is an integer number (129933561).

Almost surely, 2^259867121 is an apocalyptic number.

It is an amenable number.

259867121 is a deficient number, since it is larger than the sum of its proper divisors (1).

259867121 is an equidigital number, since it uses as much as digits as its factorization.

259867121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 259867121 is about 16120.3945671314. The cubic root of 259867121 is about 638.1416804872.

The spelling of 259867121 in words is "two hundred fifty-nine million, eight hundred sixty-seven thousand, one hundred twenty-one".