1317928 has 16 divisors (see below), whose sum is σ = 2489760. Its totient is φ = 654000.

The previous prime is 1317917. The next prime is 1317929. The reversal of 1317928 is 8297131.

It is a self number, because there is not a number n which added to its sum of digits gives 1317928.

It is not an unprimeable number, because it can be changed into a prime (1317929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2^1317928 is an apocalyptic number.

It is an amenable number.

1317928 is a deficient number, since it is larger than the sum of its proper divisors (1171832).

1317928 is a wasteful number, since it uses less digits than its factorization.

1317928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1244 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 1317928 is about 1148.0104529141. The cubic root of 1317928 is about 109.6387044292.

The spelling of 1317928 in words is "one million, three hundred seventeen thousand, nine hundred twenty-eight".