168956042 has 4 divisors (see below), whose sum is σ = 253434066. Its totient is φ = 84478020.

The previous prime is 168956009. The next prime is 168956063. The reversal of 168956042 is 240659861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240659861 = 13 ⋅18512297.

It can be written as a sum of positive squares in only one way, i.e., 143544361 + 25411681 = 11981^2 + 5041^2 .

It is a super-2 number, since 2×168956042² = 57092288256611528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42239009 + ... + 42239012.

Almost surely, 2^168956042 is an apocalyptic number.

168956042 is a deficient number, since it is larger than the sum of its proper divisors (84478024).

168956042 is an equidigital number, since it uses as much as digits as its factorization.

168956042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84478023.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 168956042 is about 12998.3091977380. The cubic root of 168956042 is about 552.8295415340.

The spelling of 168956042 in words is "one hundred sixty-eight million, nine hundred fifty-six thousand, forty-two".