261179 has 4 divisors (see below), whose sum is σ = 266784. Its totient is φ = 255576.

The previous prime is 261169. The next prime is 261223. The reversal of 261179 is 971162.

261179 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (66696).

2²⁶¹¹⁷⁹ is an apocalyptic number.

261179 is a deficient number, since it is larger than the sum of its proper divisors (5605).

261179 is an equidigital number, since it uses as much as digits as its factorization.

261179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604.

The product of its digits is 756, while the sum is 26.

The square root of 261179 is about 511.0567483167. The cubic root of 261179 is about 63.9213715380.

The spelling of 261179 in words is "two hundred sixty-one thousand, one hundred seventy-nine".