261170 has 48 divisors (see below), whose sum is σ = 603288. Its totient is φ = 80640.

The previous prime is 261169. The next prime is 261223. The reversal of 261170 is 71162.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90601 + 170569 = 301^2 + 413^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6350 + ... + 6390.

2²⁶¹¹⁷⁰ is an apocalyptic number.

261170 is an abundant number, since it is smaller than the sum of its proper divisors (342118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261170 is a wasteful number, since it uses less digits than its factorization.

261170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 68 counting only the distinct ones).

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

The square root of 261170 is about 511.0479429564. The cubic root of 261170 is about 63.9206373047.

The spelling of 261170 in words is "two hundred sixty-one thousand, one hundred seventy".