1317428 has 12 divisors (see below), whose sum is σ = 2634912. Its totient is φ = 564600.

The previous prime is 1317427. The next prime is 1317443. The reversal of 1317428 is 8247131.

1317428 is an admirable number.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1317397 and 1317406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317427) 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, 23498 + ... + 23553.

It is an arithmetic number, because the mean of its divisors is an integer number (219576).

2^1317428 is an apocalyptic number.

It is an amenable number.

1317428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317428 is a wasteful number, since it uses less digits than its factorization.

1317428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47062 (or 47060 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 1317428 is about 1147.7926642038. The cubic root of 1317428 is about 109.6248376408.

The spelling of 1317428 in words is "one million, three hundred seventeen thousand, four hundred twenty-eight".