161485 has 4 divisors (see below), whose sum is σ = 193788. Its totient is φ = 129184.

The previous prime is 161471. The next prime is 161503. The reversal of 161485 is 584161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584161 = 257 ⋅2273.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 44521 = 342^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 161485 - 2⁵ = 161453 is a prime.

It is a super-3 number, since 3×161485³ = 12633329348277375, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 16144 + ... + 16153.

It is an arithmetic number, because the mean of its divisors is an integer number (48447).

2¹⁶¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

161485 is a deficient number, since it is larger than the sum of its proper divisors (32303).

161485 is an equidigital number, since it uses as much as digits as its factorization.

161485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32302.

The product of its digits is 960, while the sum is 25.

The square root of 161485 is about 401.8519627923. The cubic root of 161485 is about 54.4557899752.

It can be divided in two parts, 161 and 485, that added together give a palindrome (646).

The spelling of 161485 in words is "one hundred sixty-one thousand, four hundred eighty-five".