261258 has 8 divisors (see below), whose sum is σ = 522528. Its totient is φ = 87084.

The previous prime is 261251. The next prime is 261271. The reversal of 261258 is 852162.

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

261258 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (261251) 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 3 ways as a sum of consecutive naturals, for example, 21766 + ... + 21777.

It is an arithmetic number, because the mean of its divisors is an integer number (65316).

2²⁶¹²⁵⁸ is an apocalyptic number.

261258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261258 is a wasteful number, since it uses less digits than its factorization.

261258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43548.

The product of its digits is 960, while the sum is 24.

The square root of 261258 is about 511.1340333024. The cubic root of 261258 is about 63.9278157509.

The spelling of 261258 in words is "two hundred sixty-one thousand, two hundred fifty-eight".