161255 has 4 divisors (see below), whose sum is σ = 193512. Its totient is φ = 129000.

The previous prime is 161237. The next prime is 161263. The reversal of 161255 is 552161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552161 = 23 ⋅24007.

It is not a de Polignac number, because 161255 - 2¹⁰ = 160231 is a prime.

It is a Duffinian 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 161255.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16121 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (48378).

2¹⁶¹²⁵⁵ is an apocalyptic number.

161255 is a deficient number, since it is larger than the sum of its proper divisors (32257).

161255 is an equidigital number, since it uses as much as digits as its factorization.

161255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32256.

The product of its digits is 300, while the sum is 20.

The square root of 161255 is about 401.5656857850. The cubic root of 161255 is about 54.4299242442.

The spelling of 161255 in words is "one hundred sixty-one thousand, two hundred fifty-five".