120144545 has 4 divisors (see below), whose sum is σ = 144173460. Its totient is φ = 96115632.

The previous prime is 120144533. The next prime is 120144547. The reversal of 120144545 is 545441021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545441021 = 23 ⋅23714827.

It can be written as a sum of positive squares in 2 ways, for example, as 42915601 + 77228944 = 6551^2 + 8788^2 .

It is a cyclic number.

It is not a de Polignac number, because 120144545 - 2⁸ = 120144289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120144547) 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 3 ways as a sum of consecutive naturals, for example, 12014450 + ... + 12014459.

It is an arithmetic number, because the mean of its divisors is an integer number (36043365).

Almost surely, 2^120144545 is an apocalyptic number.

It is an amenable number.

120144545 is a deficient number, since it is larger than the sum of its proper divisors (24028915).

120144545 is an equidigital number, since it uses as much as digits as its factorization.

120144545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24028914.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 120144545 is about 10961.0467109670. The cubic root of 120144545 is about 493.4403790821.

Adding to 120144545 its reverse (545441021), we get a palindrome (665585566).

The spelling of 120144545 in words is "one hundred twenty million, one hundred forty-four thousand, five hundred forty-five".