258045781 has 8 divisors (see below), whose sum is σ = 295251264. Its totient is φ = 220925760.

The previous prime is 258045779. The next prime is 258045791. The reversal of 258045781 is 187540852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 258045781 - 2¹ = 258045779 is a prime.

It is a super-2 number, since 2×258045781² = 133175250183799922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258045701) 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 in 7 ways as a sum of consecutive naturals, for example, 14755 + ... + 27088.

It is an arithmetic number, because the mean of its divisors is an integer number (36906408).

Almost surely, 2^258045781 is an apocalyptic number.

It is an amenable number.

258045781 is a deficient number, since it is larger than the sum of its proper divisors (37205483).

258045781 is an equidigital number, since it uses as much as digits as its factorization.

258045781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42731.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 258045781 is about 16063.8034412775. The cubic root of 258045781 is about 636.6473283723.

The spelling of 258045781 in words is "two hundred fifty-eight million, forty-five thousand, seven hundred eighty-one".