140744531 has 4 divisors (see below), whose sum is σ = 141252912. Its totient is φ = 140236152.

The previous prime is 140744509. The next prime is 140744537. The reversal of 140744531 is 135447041.

It is a happy number.

140744531 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 140744531 - 2¹⁸ = 140482387 is a prime.

It is a super-2 number, since 2×140744531² = 39618046012819922, 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 = 140744494 and 140744503.

It is not an unprimeable number, because it can be changed into a prime (140744537) 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, 253775 + ... + 254328.

It is an arithmetic number, because the mean of its divisors is an integer number (35313228).

Almost surely, 2^140744531 is an apocalyptic number.

140744531 is a deficient number, since it is larger than the sum of its proper divisors (508381).

140744531 is an equidigital number, since it uses as much as digits as its factorization.

140744531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508380.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 140744531 is about 11863.5800245963. The cubic root of 140744531 is about 520.1682529994.

The spelling of 140744531 in words is "one hundred forty million, seven hundred forty-four thousand, five hundred thirty-one".