161441 has 4 divisors (see below), whose sum is σ = 184512. Its totient is φ = 138372.

The previous prime is 161411. The next prime is 161453. The reversal of 161441 is 144161.

161441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161441 - 2⁶ = 161377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161411) 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, 11525 + ... + 11538.

It is an arithmetic number, because the mean of its divisors is an integer number (46128).

2¹⁶¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

161441 is a deficient number, since it is larger than the sum of its proper divisors (23071).

161441 is an equidigital number, since it uses as much as digits as its factorization.

161441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23070.

The product of its digits is 96, while the sum is 17.

The square root of 161441 is about 401.7972125339. The cubic root of 161441 is about 54.4508436491.

The spelling of 161441 in words is "one hundred sixty-one thousand, four hundred forty-one".