1317274521 has 4 divisors (see below), whose sum is σ = 1756366032. Its totient is φ = 878183012.

The previous prime is 1317274507. The next prime is 1317274523. The reversal of 1317274521 is 1254727131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1317274521 - 2⁵ = 1317274489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1317274523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219545751 + ... + 219545756.

It is an arithmetic number, because the mean of its divisors is an integer number (439091508).

Almost surely, 2^1317274521 is an apocalyptic number.

It is an amenable number.

1317274521 is a deficient number, since it is larger than the sum of its proper divisors (439091511).

1317274521 is an equidigital number, since it uses as much as digits as its factorization.

1317274521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439091510.

The product of its digits is 11760, while the sum is 33.

The square root of 1317274521 is about 36294.2766975731. The cubic root of 1317274521 is about 1096.2058041537.

The spelling of 1317274521 in words is "one billion, three hundred seventeen million, two hundred seventy-four thousand, five hundred twenty-one".