261695 has 8 divisors (see below), whose sum is σ = 358944. Its totient is φ = 179424.

The previous prime is 261673. The next prime is 261697. The reversal of 261695 is 596162.

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

It is not a de Polignac number, because 261695 - 2⁶ = 261631 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3704 + ... + 3773.

It is an arithmetic number, because the mean of its divisors is an integer number (44868).

2²⁶¹⁶⁹⁵ is an apocalyptic number.

261695 is a deficient number, since it is larger than the sum of its proper divisors (97249).

261695 is an equidigital number, since it uses as much as digits as its factorization.

261695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7489.

The product of its digits is 3240, while the sum is 29.

The square root of 261695 is about 511.5613355210. The cubic root of 261695 is about 63.9634394049.

The spelling of 261695 in words is "two hundred sixty-one thousand, six hundred ninety-five".