755 has 4 divisors (see below), whose sum is σ = 912. Its totient is φ = 600.

The previous prime is 751. The next prime is 757. The reversal of 755 is 557.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 755 - 2² = 751 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14 and base 15.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 80.

It is an arithmetic number, because the mean of its divisors is an integer number (228).

755 is a deficient number, since it is larger than the sum of its proper divisors (157).

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

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

The sum of its prime factors is 156.

The product of its digits is 175, while the sum is 17.

The square root of 755 is about 27.4772633281. The cubic root of 755 is about 9.1057484912.

The spelling of 755 in words is "seven hundred fifty-five", and thus it is an aban number and an oban number.