168442025 has 12 divisors (see below), whose sum is σ = 211731612. Its totient is φ = 132906240.

The previous prime is 168442009. The next prime is 168442037. The reversal of 168442025 is 520244861.

It can be written as a sum of positive squares in 6 ways, for example, as 20187049 + 148254976 = 4493^2 + 12176^2 .

It is not a de Polignac number, because 168442025 - 2⁴ = 168442009 is a prime.

It is a super-2 number, since 2×168442025² = 56745431572201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168441982 and 168442000.

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 in 11 ways as a sum of consecutive naturals, for example, 44324 + ... + 47973.

It is an arithmetic number, because the mean of its divisors is an integer number (17644301).

Almost surely, 2^168442025 is an apocalyptic number.

It is an amenable number.

168442025 is a deficient number, since it is larger than the sum of its proper divisors (43289587).

168442025 is an equidigital number, since it uses as much as digits as its factorization.

168442025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92380 (or 92375 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 168442025 is about 12978.5216800682. The cubic root of 168442025 is about 552.2683453815.

Adding to 168442025 its reverse (520244861), we get a palindrome (688686886).

The spelling of 168442025 in words is "one hundred sixty-eight million, four hundred forty-two thousand, twenty-five".