168140 has 24 divisors (see below), whose sum is σ = 403872. Its totient is φ = 57600.

The previous prime is 168127. The next prime is 168143. The reversal of 168140 is 41861.

168140 = T₈₀ + T₈₁ + ... + T₁₁₄.

168140 is nontrivially palindromic in base 9.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (16828).

2¹⁶⁸¹⁴⁰ is an apocalyptic number.

168140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168140 is an abundant number, since it is smaller than the sum of its proper divisors (235732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168140 is a wasteful number, since it uses less digits than its factorization.

168140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 168140 is about 410.0487775863. The cubic root of 168140 is about 55.1938066285.

The spelling of 168140 in words is "one hundred sixty-eight thousand, one hundred forty".