258019261 has 2 divisors, whose sum is σ = 258019262. Its totient is φ = 258019260.

The previous prime is 258019247. The next prime is 258019271. The reversal of 258019261 is 162910852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134676025 + 123343236 = 11605^2 + 11106^2 .

It is a cyclic number.

It is not a de Polignac number, because 258019261 - 2⁷ = 258019133 is a prime.

It is a super-2 number, since 2×258019261² = 133147878093972242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258019271) 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, 129009630 + 129009631.

It is an arithmetic number, because the mean of its divisors is an integer number (129009631).

Almost surely, 2^258019261 is an apocalyptic number.

It is an amenable number.

258019261 is a deficient number, since it is larger than the sum of its proper divisors (1).

258019261 is an equidigital number, since it uses as much as digits as its factorization.

258019261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 258019261 is about 16062.9779617604. The cubic root of 258019261 is about 636.6255176875.

The spelling of 258019261 in words is "two hundred fifty-eight million, nineteen thousand, two hundred sixty-one".