161015 has 4 divisors (see below), whose sum is σ = 193224. Its totient is φ = 128808.

The previous prime is 161009. The next prime is 161017. The reversal of 161015 is 510161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510161 = 191 ⋅2671.

It is a cyclic number.

It is not a de Polignac number, because 161015 - 2¹⁶ = 95479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161017) 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, 16097 + ... + 16106.

It is an arithmetic number, because the mean of its divisors is an integer number (48306).

2¹⁶¹⁰¹⁵ is an apocalyptic number.

161015 is a deficient number, since it is larger than the sum of its proper divisors (32209).

161015 is an equidigital number, since it uses as much as digits as its factorization.

161015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32208.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 161015 is about 401.2667441989. The cubic root of 161015 is about 54.4029076805.

Adding to 161015 its reverse (510161), we get a palindrome (671176).

It can be divided in two parts, 1 and 61015, that added together give a palindrome (61016).

The spelling of 161015 in words is "one hundred sixty-one thousand, fifteen".