140279 has 4 divisors (see below), whose sum is σ = 141360. Its totient is φ = 139200.

The previous prime is 140269. The next prime is 140281. The reversal of 140279 is 972041.

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: 972041 = 7 ⋅138863.

It is a cyclic number.

It is not a de Polignac number, because 140279 - 2⁴ = 140263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140249) 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 3 ways as a sum of consecutive naturals, for example, 314 + ... + 615.

It is an arithmetic number, because the mean of its divisors is an integer number (35340).

2¹⁴⁰²⁷⁹ is an apocalyptic number.

140279 is a deficient number, since it is larger than the sum of its proper divisors (1081).

140279 is an equidigital number, since it uses as much as digits as its factorization.

140279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 140279 is about 374.5383825458. The cubic root of 140279 is about 51.9594111272.

It can be divided in two parts, 140 and 279, that multiplied together give a triangular number (39060 = T₂₇₉).

The spelling of 140279 in words is "one hundred forty thousand, two hundred seventy-nine".