165461 has 4 divisors (see below), whose sum is σ = 175212. Its totient is φ = 155712.

The previous prime is 165457. The next prime is 165463. The reversal of 165461 is 164561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136900 + 28561 = 370^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 165461 - 2² = 165457 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 165461.

It is not an unprimeable number, because it can be changed into a prime (165463) 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, 4850 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (43803).

2¹⁶⁵⁴⁶¹ is an apocalyptic number.

It is an amenable number.

165461 is a deficient number, since it is larger than the sum of its proper divisors (9751).

165461 is an equidigital number, since it uses as much as digits as its factorization.

165461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9750.

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

The square root of 165461 is about 406.7689762015. The cubic root of 165461 is about 54.8990987495.

Subtracting from 165461 its reverse (164561), we obtain a square (900 = 30²).

It can be divided in two parts, 165 and 461, that added together give a palindrome (626).

The spelling of 165461 in words is "one hundred sixty-five thousand, four hundred sixty-one".