1220812 has 12 divisors (see below), whose sum is σ = 2147040. Its totient is φ = 607376.

The previous prime is 1220803. The next prime is 1220819. The reversal of 1220812 is 2180221.

It is not an unprimeable number, because it can be changed into a prime (1220819) 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, 318 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (178920).

2^1220812 is an apocalyptic number.

It is an amenable number.

1220812 is a deficient number, since it is larger than the sum of its proper divisors (926228).

1220812 is a wasteful number, since it uses less digits than its factorization.

1220812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1220812 is about 1104.9036157059. The cubic root of 1220812 is about 106.8766739361.

The spelling of 1220812 in words is "one million, two hundred twenty thousand, eight hundred twelve".