1305423143125 has 20 divisors (see below), whose sum is σ = 1631347086204. Its totient is φ = 1044280688000.

The previous prime is 1305423143117. The next prime is 1305423143173. The reversal of 1305423143125 is 5213413245031.

It can be written as a sum of positive squares in 10 ways, for example, as 270481126084 + 1034942017041 = 520078^2 + 1017321^2 .

It is not a de Polignac number, because 1305423143125 - 2³ = 1305423143117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13951497 + ... + 14044753.

Almost surely, 2^{1305423143125} is an apocalyptic number.

It is an amenable number.

1305423143125 is a deficient number, since it is larger than the sum of its proper divisors (325923943079).

1305423143125 is an frugal number, since it uses more digits than its factorization.

1305423143125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115674 (or 115659 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 1305423143125 its reverse (5213413245031), we get a palindrome (6518836388156).

The spelling of 1305423143125 in words is "one trillion, three hundred five billion, four hundred twenty-three million, one hundred forty-three thousand, one hundred twenty-five".