140861 has 4 divisors (see below), whose sum is σ = 160992. Its totient is φ = 120732.

The previous prime is 140839. The next prime is 140863. The reversal of 140861 is 168041.

140861 = T₆₀ + T₆₁ + ... + T₁₀₁.

140861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 168041 = 197 ⋅853.

It is a cyclic number.

It is not a de Polignac number, because 140861 - 2⁶ = 140797 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140863) 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, 10055 + ... + 10068.

It is an arithmetic number, because the mean of its divisors is an integer number (40248).

2¹⁴⁰⁸⁶¹ is an apocalyptic number.

It is an amenable number.

140861 is a deficient number, since it is larger than the sum of its proper divisors (20131).

140861 is an equidigital number, since it uses as much as digits as its factorization.

140861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20130.

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

The square root of 140861 is about 375.3145347572. The cubic root of 140861 is about 52.0311696756.

It can be divided in two parts, 140 and 861, that added together give a palindrome (1001).

The spelling of 140861 in words is "one hundred forty thousand, eight hundred sixty-one".