140438531 has 8 divisors (see below), whose sum is σ = 143090544. Its totient is φ = 137797920.

The previous prime is 140438521. The next prime is 140438533. The reversal of 140438531 is 135834041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140438531 is a prime.

It is a super-2 number, since 2×140438531² = 39445961978875922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140438494 and 140438503.

It is not an unprimeable number, because it can be changed into a prime (140438533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24425 + ... + 29621.

It is an arithmetic number, because the mean of its divisors is an integer number (17886318).

Almost surely, 2^140438531 is an apocalyptic number.

140438531 is a deficient number, since it is larger than the sum of its proper divisors (2652013).

140438531 is an equidigital number, since it uses as much as digits as its factorization.

140438531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5701.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 140438531 is about 11850.6763941979. The cubic root of 140438531 is about 519.7910045238.

It can be divided in two parts, 140438 and 531, that multiplied together give a triangular number (74572578 = T₁₂₂₁₂).

The spelling of 140438531 in words is "one hundred forty million, four hundred thirty-eight thousand, five hundred thirty-one".