259837561 has 2 divisors, whose sum is σ = 259837562. Its totient is φ = 259837560.

The previous prime is 259837531. The next prime is 259837603. The reversal of 259837561 is 165738952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232745536 + 27092025 = 15256^2 + 5205^2 .

It is a cyclic number.

It is not a de Polignac number, because 259837561 - 2¹³ = 259829369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259837531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129918780 + 129918781.

It is an arithmetic number, because the mean of its divisors is an integer number (129918781).

Almost surely, 2^259837561 is an apocalyptic number.

It is an amenable number.

259837561 is a deficient number, since it is larger than the sum of its proper divisors (1).

259837561 is an equidigital number, since it uses as much as digits as its factorization.

259837561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 259837561 is about 16119.4776900494. The cubic root of 259837561 is about 638.1174832702.

The spelling of 259837561 in words is "two hundred fifty-nine million, eight hundred thirty-seven thousand, five hundred sixty-one".