165241441 has 4 divisors (see below), whose sum is σ = 166072000. Its totient is φ = 164410884.

The previous prime is 165241399. The next prime is 165241457. The reversal of 165241441 is 144142561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144142561 = 47 ⋅3066863.

It is a cyclic number.

It is not a de Polignac number, because 165241441 - 2¹⁹ = 164717153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165241471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414981 + ... + 415378.

It is an arithmetic number, because the mean of its divisors is an integer number (41518000).

Almost surely, 2^165241441 is an apocalyptic number.

It is an amenable number.

165241441 is a deficient number, since it is larger than the sum of its proper divisors (830559).

165241441 is an equidigital number, since it uses as much as digits as its factorization.

165241441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830558.

The product of its digits is 3840, while the sum is 28.

The square root of 165241441 is about 12854.6272213550. The cubic root of 165241441 is about 548.7480515633.

The spelling of 165241441 in words is "one hundred sixty-five million, two hundred forty-one thousand, four hundred forty-one".