261193 has 8 divisors (see below), whose sum is σ = 280800. Its totient is φ = 242208.

The previous prime is 261169. The next prime is 261223. The reversal of 261193 is 391162.

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 261193 - 2¹⁷ = 130121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (261593) 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, 1005 + ... + 1237.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2²⁶¹¹⁹³ is an apocalyptic number.

It is an amenable number.

261193 is a deficient number, since it is larger than the sum of its proper divisors (19607).

261193 is a wasteful number, since it uses less digits than its factorization.

261193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 324, while the sum is 22.

The square root of 261193 is about 511.0704452421. The cubic root of 261193 is about 63.9225136451.

It can be divided in two parts, 2611 and 93, that added together give a square (2704 = 52²).

The spelling of 261193 in words is "two hundred sixty-one thousand, one hundred ninety-three".