140540561 has 8 divisors (see below), whose sum is σ = 161004480. Its totient is φ = 120173328.

The previous prime is 140540551. The next prime is 140540573. The reversal of 140540561 is 165045041.

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

It is a cyclic number.

It is not a de Polignac number, because 140540561 - 2¹⁴ = 140524177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140540561.

It is not an unprimeable number, because it can be changed into a prime (140540501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21026 + ... + 26891.

It is an arithmetic number, because the mean of its divisors is an integer number (20125560).

Almost surely, 2^140540561 is an apocalyptic number.

It is an amenable number.

140540561 is a deficient number, since it is larger than the sum of its proper divisors (20463919).

140540561 is an equidigital number, since it uses as much as digits as its factorization.

140540561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48343.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 140540561 is about 11854.9804301821. The cubic root of 140540561 is about 519.9168518434.

The spelling of 140540561 in words is "one hundred forty million, five hundred forty thousand, five hundred sixty-one".