161265 has 16 divisors (see below), whose sum is σ = 278208. Its totient is φ = 79296.

The previous prime is 161263. The next prime is 161267. The reversal of 161265 is 562161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161263) and next prime (161267).

It is not a de Polignac number, because 161265 - 2¹ = 161263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161263) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 219 + ... + 608.

It is an arithmetic number, because the mean of its divisors is an integer number (17388).

2¹⁶¹²⁶⁵ is an apocalyptic number.

161265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161265 is a deficient number, since it is larger than the sum of its proper divisors (116943).

161265 is a wasteful number, since it uses less digits than its factorization.

161265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 360, while the sum is 21.

The square root of 161265 is about 401.5781368551. The cubic root of 161265 is about 54.4310493525.

The spelling of 161265 in words is "one hundred sixty-one thousand, two hundred sixty-five".