140144531 has 4 divisors (see below), whose sum is σ = 140878464. Its totient is φ = 139410600.

The previous prime is 140144509. The next prime is 140144539. The reversal of 140144531 is 135441041.

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 140144531 - 2¹⁴ = 140128147 is a prime.

It is a super-2 number, since 2×140144531² = 39280979138419922, 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 = 140144497 and 140144506.

It is not an unprimeable number, because it can be changed into a prime (140144539) 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, 366680 + ... + 367061.

It is an arithmetic number, because the mean of its divisors is an integer number (35219616).

Almost surely, 2^140144531 is an apocalyptic number.

140144531 is a deficient number, since it is larger than the sum of its proper divisors (733933).

140144531 is an equidigital number, since it uses as much as digits as its factorization.

140144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733932.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 140144531 is about 11838.2655401879. The cubic root of 140144531 is about 519.4280335799.

Adding to 140144531 its reverse (135441041), we get a palindrome (275585572).

The spelling of 140144531 in words is "one hundred forty million, one hundred forty-four thousand, five hundred thirty-one".