140631 has 4 divisors (see below), whose sum is σ = 187512. Its totient is φ = 93752.

The previous prime is 140629. The next prime is 140639. The reversal of 140631 is 136041.

140631 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.

It is a cyclic number.

It is not a de Polignac number, because 140631 - 2¹ = 140629 is a prime.

It is a super-2 number, since 2×140631² = 39554156322, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 140631.

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 140631.

It is not an unprimeable number, because it can be changed into a prime (140639) 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, 23436 + ... + 23441.

It is an arithmetic number, because the mean of its divisors is an integer number (46878).

2¹⁴⁰⁶³¹ is an apocalyptic number.

140631 is a deficient number, since it is larger than the sum of its proper divisors (46881).

140631 is an equidigital number, since it uses as much as digits as its factorization.

140631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46880.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 140631 is about 375.0079999147. The cubic root of 140631 is about 52.0028351511.

Adding to 140631 its reverse (136041), we get a palindrome (276672).

The spelling of 140631 in words is "one hundred forty thousand, six hundred thirty-one".