170261 has 8 divisors (see below), whose sum is σ = 209664. Its totient is φ = 134640.

The previous prime is 170249. The next prime is 170263. The reversal of 170261 is 162071.

It is a happy number.

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 170261 - 2⁶ = 170197 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170263) 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, 845 + ... + 1026.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2¹⁷⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

170261 is a deficient number, since it is larger than the sum of its proper divisors (39403).

170261 is a wasteful number, since it uses less digits than its factorization.

170261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 170261 is about 412.6269501620. The cubic root of 170261 is about 55.4249180872.

The spelling of 170261 in words is "one hundred seventy thousand, two hundred sixty-one".