1305171438481 has 9 divisors (see below), whose sum is σ = 1314788682441. Its totient is φ = 1295624059044.

The previous prime is 1305171438437. The next prime is 1305171438523. The reversal of 1305171438481 is 1848341715031.

The square root of 1305171438481 is 1142441.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1305171438481 - 2¹¹ = 1305171436433 is a prime.

It is a super-2 number, since 2×1305171438481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305171438421) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 158795190 + ... + 158803408.

Almost surely, 2^{1305171438481} is an apocalyptic number.

1305171438481 is the 1142441-st square number.

1305171438481 is the 571221-st centered octagonal number.

It is an amenable number.

1305171438481 is a deficient number, since it is larger than the sum of its proper divisors (9617243960).

1305171438481 is an frugal number, since it uses more digits than its factorization.

1305171438481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16716 (or 8358 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 1305171438481 in words is "one trillion, three hundred five billion, one hundred seventy-one million, four hundred thirty-eight thousand, four hundred eighty-one".