140405585 has 4 divisors (see below), whose sum is σ = 168486708. Its totient is φ = 112324464.

The previous prime is 140405561. The next prime is 140405597. The reversal of 140405585 is 585504041.

140405585 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: 585504041 = 277 ⋅2113733.

It can be written as a sum of positive squares in 2 ways, for example, as 105842944 + 34562641 = 10288^2 + 5879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140405585 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14040554 + ... + 14040563.

It is an arithmetic number, because the mean of its divisors is an integer number (42121677).

Almost surely, 2^140405585 is an apocalyptic number.

It is an amenable number.

140405585 is a deficient number, since it is larger than the sum of its proper divisors (28081123).

140405585 is an equidigital number, since it uses as much as digits as its factorization.

140405585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28081122.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 140405585 is about 11849.2862654254. The cubic root of 140405585 is about 519.7503547733.

The spelling of 140405585 in words is "one hundred forty million, four hundred five thousand, five hundred eighty-five".