1216356 has 12 divisors (see below), whose sum is σ = 2838192. Its totient is φ = 405448.

The previous prime is 1216351. The next prime is 1216373. The reversal of 1216356 is 6536121.

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

It is not an unprimeable number, because it can be changed into a prime (1216351) 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, 50670 + ... + 50693.

It is an arithmetic number, because the mean of its divisors is an integer number (236516).

2^1216356 is an apocalyptic number.

It is an amenable number.

1216356 is an abundant number, since it is smaller than the sum of its proper divisors (1621836).

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

1216356 is a wasteful number, since it uses less digits than its factorization.

1216356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101370 (or 101368 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1216356 is about 1102.8853068203. The cubic root of 1216356 is about 106.7464810618.

The spelling of 1216356 in words is "one million, two hundred sixteen thousand, three hundred fifty-six".