144641165 has 4 divisors (see below), whose sum is σ = 173569404. Its totient is φ = 115712928.

The previous prime is 144641093. The next prime is 144641197. The reversal of 144641165 is 561146441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561146441 = 71 ⋅7903471.

It can be written as a sum of positive squares in 2 ways, for example, as 106461124 + 38180041 = 10318^2 + 6179^2 .

It is a cyclic number.

It is not a de Polignac number, because 144641165 - 2¹⁸ = 144379021 is a prime.

It is a super-2 number, since 2×144641165² = 41842133225114450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 14464112 + ... + 14464121.

It is an arithmetic number, because the mean of its divisors is an integer number (43392351).

Almost surely, 2^144641165 is an apocalyptic number.

It is an amenable number.

144641165 is a deficient number, since it is larger than the sum of its proper divisors (28928239).

144641165 is an equidigital number, since it uses as much as digits as its factorization.

144641165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28928238.

The product of its digits is 11520, while the sum is 32.

The square root of 144641165 is about 12026.6855367553. The cubic root of 144641165 is about 524.9250565737.

The spelling of 144641165 in words is "one hundred forty-four million, six hundred forty-one thousand, one hundred sixty-five".