291255 has 8 divisors (see below), whose sum is σ = 466032. Its totient is φ = 155328.

The previous prime is 291253. The next prime is 291257. The reversal of 291255 is 552192.

It is an interprime number because it is at equal distance from previous prime (291253) and next prime (291257).

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

It is not a de Polignac number, because 291255 - 2¹ = 291253 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291255.

It is not an unprimeable number, because it can be changed into a prime (291253) 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, 9694 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (58254).

2²⁹¹²⁵⁵ is an apocalyptic number.

291255 is a deficient number, since it is larger than the sum of its proper divisors (174777).

291255 is a wasteful number, since it uses less digits than its factorization.

291255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19425.

The product of its digits is 900, while the sum is 24.

The square root of 291255 is about 539.6804610137. The cubic root of 291255 is about 66.2864045795.

The spelling of 291255 in words is "two hundred ninety-one thousand, two hundred fifty-five".