861875258 has 8 divisors (see below), whose sum is σ = 1294289652. Its totient is φ = 430445376.

The previous prime is 861875257. The next prime is 861875279. The reversal of 861875258 is 852578168.

It can be written as a sum of positive squares in 2 ways, for example, as 861246409 + 628849 = 29347^2 + 793^2 .

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

It is not an unprimeable number, because it can be changed into a prime (861875257) 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 3 ways as a sum of consecutive naturals, for example, 243935 + ... + 247442.

Almost surely, 2^861875258 is an apocalyptic number.

861875258 is a deficient number, since it is larger than the sum of its proper divisors (432414394).

861875258 is a wasteful number, since it uses less digits than its factorization.

861875258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492256.

The product of its digits is 1075200, while the sum is 50.

The square root of 861875258 is about 29357.7120702551. The cubic root of 861875258 is about 951.6592454699.

The spelling of 861875258 in words is "eight hundred sixty-one million, eight hundred seventy-five thousand, two hundred fifty-eight".