144171120521 has 8 divisors (see below), whose sum is σ = 149428816200. Its totient is φ = 138932510080.

The previous prime is 144171120479. The next prime is 144171120529. The reversal of 144171120521 is 125021171441.

It can be written as a sum of positive squares in 4 ways, for example, as 3537870400 + 140633250121 = 59480^2 + 375011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144171120521 is a prime.

It is a super-2 number, since 2×144171120521² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144171120529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755926 + ... + 4786143.

It is an arithmetic number, because the mean of its divisors is an integer number (18678602025).

Almost surely, 2^144171120521 is an apocalyptic number.

It is an amenable number.

144171120521 is a deficient number, since it is larger than the sum of its proper divisors (5257695679).

144171120521 is an equidigital number, since it uses as much as digits as its factorization.

144171120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542619.

The product of its (nonzero) digits is 2240, while the sum is 29.

Adding to 144171120521 its reverse (125021171441), we get a palindrome (269192291962).

The spelling of 144171120521 in words is "one hundred forty-four billion, one hundred seventy-one million, one hundred twenty thousand, five hundred twenty-one".