258080561 has 2 divisors, whose sum is σ = 258080562. Its totient is φ = 258080560.

The previous prime is 258080533. The next prime is 258080579. The reversal of 258080561 is 165080852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231496225 + 26584336 = 15215^2 + 5156^2 .

It is a cyclic number.

It is not a de Polignac number, because 258080561 - 2¹⁰ = 258079537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258080521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129040280 + 129040281.

It is an arithmetic number, because the mean of its divisors is an integer number (129040281).

Almost surely, 2^258080561 is an apocalyptic number.

It is an amenable number.

258080561 is a deficient number, since it is larger than the sum of its proper divisors (1).

258080561 is an equidigital number, since it uses as much as digits as its factorization.

258080561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 258080561 is about 16064.8859628695. The cubic root of 258080561 is about 636.6759300146.

The spelling of 258080561 in words is "two hundred fifty-eight million, eighty thousand, five hundred sixty-one".