168542071 has 4 divisors (see below), whose sum is σ = 173978944. Its totient is φ = 163105200.

The previous prime is 168542053. The next prime is 168542089. The reversal of 168542071 is 170245861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170245861 = 67 ⋅2540983.

It is an interprime number because it is at equal distance from previous prime (168542053) and next prime (168542089).

It is a cyclic number.

It is not a de Polignac number, because 168542071 - 2⁵ = 168542039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168543071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2718390 + ... + 2718451.

It is an arithmetic number, because the mean of its divisors is an integer number (43494736).

Almost surely, 2^168542071 is an apocalyptic number.

168542071 is a deficient number, since it is larger than the sum of its proper divisors (5436873).

168542071 is an equidigital number, since it uses as much as digits as its factorization.

168542071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436872.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 168542071 is about 12982.3753989784. The cubic root of 168542071 is about 552.3776635153.

The spelling of 168542071 in words is "one hundred sixty-eight million, five hundred forty-two thousand, seventy-one".