140345 has 4 divisors (see below), whose sum is σ = 168420. Its totient is φ = 112272.

The previous prime is 140339. The next prime is 140351. The reversal of 140345 is 543041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543041 = 257 ⋅2113.

It is an interprime number because it is at equal distance from previous prime (140339) and next prime (140351).

It can be written as a sum of positive squares in 2 ways, for example, as 32761 + 107584 = 181^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 140345 - 2⁶ = 140281 is a prime.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14030 + ... + 14039.

It is an arithmetic number, because the mean of its divisors is an integer number (42105).

2¹⁴⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

140345 is a deficient number, since it is larger than the sum of its proper divisors (28075).

140345 is an equidigital number, since it uses as much as digits as its factorization.

140345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28074.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 140345 is about 374.6264806444. The cubic root of 140345 is about 51.9675586604.

Adding to 140345 its reverse (543041), we get a palindrome (683386).

The spelling of 140345 in words is "one hundred forty thousand, three hundred forty-five".