1307972417921 has 4 divisors (see below), whose sum is σ = 1408585680852. Its totient is φ = 1207359154992.

The previous prime is 1307972417911. The next prime is 1307972417953. The reversal of 1307972417921 is 1297142797031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145649089600 + 1162323328321 = 381640^2 + 1078111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307972417921 - 2²⁶ = 1307905309057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1307972417911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50306631446 + ... + 50306631471.

It is an arithmetic number, because the mean of its divisors is an integer number (352146420213).

Almost surely, 2^{1307972417921} is an apocalyptic number.

It is an amenable number.

1307972417921 is a deficient number, since it is larger than the sum of its proper divisors (100613262931).

1307972417921 is a wasteful number, since it uses less digits than its factorization.

1307972417921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100613262930.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 1307972417921 in words is "one trillion, three hundred seven billion, nine hundred seventy-two million, four hundred seventeen thousand, nine hundred twenty-one".