1305500473721 has 16 divisors (see below), whose sum is σ = 1392357657600. Its totient is φ = 1219762914048.

The previous prime is 1305500473691. The next prime is 1305500473723. The reversal of 1305500473721 is 1273740055031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1305500473721 - 2¹⁰ = 1305500472697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305500473723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54972776 + ... + 54996518.

It is an arithmetic number, because the mean of its divisors is an integer number (87022353600).

Almost surely, 2^{1305500473721} is an apocalyptic number.

It is an amenable number.

1305500473721 is a deficient number, since it is larger than the sum of its proper divisors (86857183879).

1305500473721 is a wasteful number, since it uses less digits than its factorization.

1305500473721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47168.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 1305500473721 in words is "one trillion, three hundred five billion, five hundred million, four hundred seventy-three thousand, seven hundred twenty-one".