168252442 has 4 divisors (see below), whose sum is σ = 252378666. Its totient is φ = 84126220.

The previous prime is 168252437. The next prime is 168252523. The reversal of 168252442 is 244252861.

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., 146434201 + 21818241 = 12101^2 + 4671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168252398 and 168252407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42063109 + ... + 42063112.

Almost surely, 2^168252442 is an apocalyptic number.

168252442 is a deficient number, since it is larger than the sum of its proper divisors (84126224).

168252442 is an equidigital number, since it uses as much as digits as its factorization.

168252442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84126223.

The product of its digits is 30720, while the sum is 34.

The square root of 168252442 is about 12971.2159029137. The cubic root of 168252442 is about 552.0610732853.

The spelling of 168252442 in words is "one hundred sixty-eight million, two hundred fifty-two thousand, four hundred forty-two".