140641 has 4 divisors (see below), whose sum is σ = 148932. Its totient is φ = 132352.

The previous prime is 140639. The next prime is 140659. The reversal of 140641 is 146041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108241 + 32400 = 329^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 140641 - 2¹ = 140639 is a prime.

It is a Duffinian number.

140641 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140641.

It is not an unprimeable number, because it can be changed into a prime (140611) 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 3 ways as a sum of consecutive naturals, for example, 4120 + ... + 4153.

It is an arithmetic number, because the mean of its divisors is an integer number (37233).

2¹⁴⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

140641 is a deficient number, since it is larger than the sum of its proper divisors (8291).

140641 is an equidigital number, since it uses as much as digits as its factorization.

140641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8290.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 140641 is about 375.0213327266. The cubic root of 140641 is about 52.0040677291.

Subtracting from 140641 its sum of digits (16), we obtain a square (140625 = 375²).

Adding to 140641 its reverse (146041), we get a palindrome (286682).

The spelling of 140641 in words is "one hundred forty thousand, six hundred forty-one".