140531 has 4 divisors (see below), whose sum is σ = 142200. Its totient is φ = 138864.

The previous prime is 140527. The next prime is 140533. The reversal of 140531 is 135041.

140531 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 an emirpimes, since its reverse is a distinct semiprime: 135041 = 83 ⋅1627.

It is a cyclic number.

It is not a de Polignac number, because 140531 - 2² = 140527 is a prime.

It is a super-2 number, since 2×140531² = 39497923922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140531.

It is not an unprimeable number, because it can be changed into a prime (140533) 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, 701 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (35550).

2¹⁴⁰⁵³¹ is an apocalyptic number.

140531 is a deficient number, since it is larger than the sum of its proper divisors (1669).

140531 is an equidigital number, since it uses as much as digits as its factorization.

140531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 140531 is about 374.8746457151. The cubic root of 140531 is about 51.9905061563.

Adding to 140531 its reverse (135041), we get a palindrome (275572).

The spelling of 140531 in words is "one hundred forty thousand, five hundred thirty-one".