1220316 has 12 divisors (see below), whose sum is σ = 2847432. Its totient is φ = 406768.

The previous prime is 1220309. The next prime is 1220327. The reversal of 1220316 is 6130221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1220316² = 2978342279712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220295 and 1220304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50835 + ... + 50858.

It is an arithmetic number, because the mean of its divisors is an integer number (237286).

2^1220316 is an apocalyptic number.

It is an amenable number.

1220316 is an abundant number, since it is smaller than the sum of its proper divisors (1627116).

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

1220316 is a wasteful number, since it uses less digits than its factorization.

1220316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101700 (or 101698 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220316 is about 1104.6791389358. The cubic root of 1220316 is about 106.8621977757.

Adding to 1220316 its reverse (6130221), we get a palindrome (7350537).

The spelling of 1220316 in words is "one million, two hundred twenty thousand, three hundred sixteen".