1217328 has 40 divisors (see below), whose sum is σ = 3595008. Its totient is φ = 347712.

The previous prime is 1217317. The next prime is 1217329. The reversal of 1217328 is 8237121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1217298 and 1217307.

It is not an unprimeable number, because it can be changed into a prime (1217329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 2147.

2^1217328 is an apocalyptic number.

It is an amenable number.

1217328 is an abundant number, since it is smaller than the sum of its proper divisors (2377680).

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

1217328 is a wasteful number, since it uses less digits than its factorization.

1217328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641 (or 3635 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 1217328 is about 1103.3258811430. The cubic root of 1217328 is about 106.7749074858.

It can be divided in two parts, 121 and 7328, that multiplied together give a palindrome (886688).

The spelling of 1217328 in words is "one million, two hundred seventeen thousand, three hundred twenty-eight".