1216528 has 20 divisors (see below), whose sum is σ = 2378320. Its totient is φ = 602784.

The previous prime is 1216507. The next prime is 1216529. The reversal of 1216528 is 8256121.

It is not an unprimeable number, because it can be changed into a prime (1216529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951 + ... + 2497.

It is an arithmetic number, because the mean of its divisors is an integer number (118916).

2^1216528 is an apocalyptic number.

It is an amenable number.

1216528 is a deficient number, since it is larger than the sum of its proper divisors (1161792).

1216528 is a wasteful number, since it uses less digits than its factorization.

1216528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 688 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1216528 is about 1102.9632813471. The cubic root of 1216528 is about 106.7515123546.

The spelling of 1216528 in words is "one million, two hundred sixteen thousand, five hundred twenty-eight".