255742 has 8 divisors (see below), whose sum is σ = 389232. Its totient is φ = 126000.

The previous prime is 255733. The next prime is 255743. The reversal of 255742 is 247552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759 + ... + 1042.

It is an arithmetic number, because the mean of its divisors is an integer number (48654).

2²⁵⁵⁷⁴² is an apocalyptic number.

255742 is a deficient number, since it is larger than the sum of its proper divisors (133490).

255742 is a wasteful number, since it uses less digits than its factorization.

255742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874.

The product of its digits is 2800, while the sum is 25.

The square root of 255742 is about 505.7094027206. The cubic root of 255742 is about 63.4747042073.

The spelling of 255742 in words is "two hundred fifty-five thousand, seven hundred forty-two".