140545 has 4 divisors (see below), whose sum is σ = 168660. Its totient is φ = 112432.

The previous prime is 140533. The next prime is 140549. The reversal of 140545 is 545041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545041 = 7 ⋅77863.

It can be written as a sum of positive squares in 2 ways, for example, as 16641 + 123904 = 129^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 140545 - 2⁷ = 140417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14050 + ... + 14059.

It is an arithmetic number, because the mean of its divisors is an integer number (42165).

2¹⁴⁰⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

140545 is a deficient number, since it is larger than the sum of its proper divisors (28115).

140545 is an equidigital number, since it uses as much as digits as its factorization.

140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28114.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 140545 is about 374.8933181586. The cubic root of 140545 is about 51.9922325676.

Adding to 140545 its reverse (545041), we get a palindrome (685586).

Subtracting 140545 from its reverse (545041), we obtain a square (404496 = 636²).

The spelling of 140545 in words is "one hundred forty thousand, five hundred forty-five".