140181 has 4 divisors (see below), whose sum is σ = 186912. Its totient is φ = 93452.

The previous prime is 140177. The next prime is 140191. The reversal of 140181 is 181041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140181 - 2² = 140177 is a prime.

It is a super-2 number, since 2×140181² = 39301425522, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 140181.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140181.

It is not an unprimeable number, because it can be changed into a prime (140111) 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, 23361 + ... + 23366.

It is an arithmetic number, because the mean of its divisors is an integer number (46728).

2¹⁴⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

140181 is a deficient number, since it is larger than the sum of its proper divisors (46731).

140181 is an equidigital number, since it uses as much as digits as its factorization.

140181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46730.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 140181 is about 374.4075319755. The cubic root of 140181 is about 51.9473085589.

The spelling of 140181 in words is "one hundred forty thousand, one hundred eighty-one".