140489 has 4 divisors (see below), whose sum is σ = 144324. Its totient is φ = 136656.

The previous prime is 140477. The next prime is 140521. The reversal of 140489 is 984041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984041 = 41 ⋅24001.

It can be written as a sum of positive squares in 2 ways, for example, as 55225 + 85264 = 235^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 140489 - 2⁴ = 140473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140419) by changing a digit.

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, 1862 + ... + 1935.

It is an arithmetic number, because the mean of its divisors is an integer number (36081).

2¹⁴⁰⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

140489 is a deficient number, since it is larger than the sum of its proper divisors (3835).

140489 is an equidigital number, since it uses as much as digits as its factorization.

140489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 140489 is about 374.8186228031. The cubic root of 140489 is about 51.9853262344.

The spelling of 140489 in words is "one hundred forty thousand, four hundred eighty-nine".