1317487121 has 2 divisors, whose sum is σ = 1317487122. Its totient is φ = 1317487120.

The previous prime is 1317487117. The next prime is 1317487141. The reversal of 1317487121 is 1217847131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939729025 + 377758096 = 30655^2 + 19436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317487121 - 2² = 1317487117 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317487141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658743560 + 658743561.

It is an arithmetic number, because the mean of its divisors is an integer number (658743561).

Almost surely, 2^1317487121 is an apocalyptic number.

It is an amenable number.

1317487121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317487121 is an equidigital number, since it uses as much as digits as its factorization.

1317487121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 35.

The square root of 1317487121 is about 36297.2054158443. The cubic root of 1317487121 is about 1096.2647746046.

The spelling of 1317487121 in words is "one billion, three hundred seventeen million, four hundred eighty-seven thousand, one hundred twenty-one".