260139 has 8 divisors (see below), whose sum is σ = 378432. Its totient is φ = 157640.

The previous prime is 260137. The next prime is 260171. The reversal of 260139 is 931062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 260139 - 2¹ = 260137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (260137) 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 7 ways as a sum of consecutive naturals, for example, 3909 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (47304).

2²⁶⁰¹³⁹ is an apocalyptic number.

260139 is a deficient number, since it is larger than the sum of its proper divisors (118293).

260139 is a wasteful number, since it uses less digits than its factorization.

260139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 260139 is about 510.0382338610. The cubic root of 260139 is about 63.8364149123.

The spelling of 260139 in words is "two hundred sixty thousand, one hundred thirty-nine".