161465 has 8 divisors (see below), whose sum is σ = 198528. Its totient is φ = 126000.

The previous prime is 161461. The next prime is 161471. The reversal of 161465 is 564161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161465 - 2² = 161461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161465.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161465.

It is not an unprimeable number, because it can be changed into a prime (161461) 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 7 ways as a sum of consecutive naturals, for example, 161 + ... + 590.

It is an arithmetic number, because the mean of its divisors is an integer number (24816).

2¹⁶¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

161465 is a deficient number, since it is larger than the sum of its proper divisors (37063).

161465 is an equidigital number, since it uses as much as digits as its factorization.

161465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 720, while the sum is 23.

The square root of 161465 is about 401.8270772360. The cubic root of 161465 is about 54.4535417565.

It can be divided in two parts, 161 and 465, that added together give a palindrome (626).

The spelling of 161465 in words is "one hundred sixty-one thousand, four hundred sixty-five".