140579 has 4 divisors (see below), whose sum is σ = 141384. Its totient is φ = 139776.

The previous prime is 140557. The next prime is 140587. The reversal of 140579 is 975041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 975041 = 53 ⋅18397.

It is a cyclic number.

It is not a de Polignac number, because 140579 - 2¹² = 136483 is a prime.

It is a Duffinian number.

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 530.

It is an arithmetic number, because the mean of its divisors is an integer number (35346).

2¹⁴⁰⁵⁷⁹ is an apocalyptic number.

140579 is a deficient number, since it is larger than the sum of its proper divisors (805).

140579 is an equidigital number, since it uses as much as digits as its factorization.

140579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 140579 is about 374.9386616501. The cubic root of 140579 is about 51.9964248035.

The spelling of 140579 in words is "one hundred forty thousand, five hundred seventy-nine".