261595 has 8 divisors (see below), whose sum is σ = 317376. Its totient is φ = 206976.

The previous prime is 261593. The next prime is 261601. The reversal of 261595 is 595162.

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 261595 - 2¹ = 261593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261593) 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, 334 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (39672).

2²⁶¹⁵⁹⁵ is an apocalyptic number.

261595 is a deficient number, since it is larger than the sum of its proper divisors (55781).

261595 is a wasteful number, since it uses less digits than its factorization.

261595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 2700, while the sum is 28.

The square root of 261595 is about 511.4635861916. The cubic root of 261595 is about 63.9552910402.

The spelling of 261595 in words is "two hundred sixty-one thousand, five hundred ninety-five".