168421258 has 4 divisors (see below), whose sum is σ = 252631890. Its totient is φ = 84210628.

The previous prime is 168421219. The next prime is 168421273. The reversal of 168421258 is 852124861.

168421258 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 166590649 + 1830609 = 12907^2 + 1353^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42105313 + ... + 42105316.

Almost surely, 2^168421258 is an apocalyptic number.

168421258 is a deficient number, since it is larger than the sum of its proper divisors (84210632).

168421258 is an equidigital number, since it uses as much as digits as its factorization.

168421258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84210631.

The product of its digits is 30720, while the sum is 37.

The square root of 168421258 is about 12977.7216028084. The cubic root of 168421258 is about 552.2456482980.

The spelling of 168421258 in words is "one hundred sixty-eight million, four hundred twenty-one thousand, two hundred fifty-eight".