1317323421 has 24 divisors (see below), whose sum is σ = 2043123264. Its totient is φ = 814907520.

The previous prime is 1317323401. The next prime is 1317323431. The reversal of 1317323421 is 1243237131.

It is a happy number.

1317323421 is a `hidden beast` number, since 1 + 317 + 3 + 2 + 342 + 1 = 666.

It is not a de Polignac number, because 1317323421 - 2²³ = 1308934813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317323401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49771 + ... + 71496.

It is an arithmetic number, because the mean of its divisors is an integer number (85130136).

Almost surely, 2^1317323421 is an apocalyptic number.

It is an amenable number.

1317323421 is a deficient number, since it is larger than the sum of its proper divisors (725799843).

1317323421 is a wasteful number, since it uses less digits than its factorization.

1317323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121361 (or 121358 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 1317323421 is about 36294.9503512541. The cubic root of 1317323421 is about 1096.2193684740.

The spelling of 1317323421 in words is "one billion, three hundred seventeen million, three hundred twenty-three thousand, four hundred twenty-one".