1366216 has 8 divisors (see below), whose sum is σ = 2561670. Its totient is φ = 683104.

The previous prime is 1366213. The next prime is 1366241. The reversal of 1366216 is 6126631.

It can be written as a sum of positive squares in only one way, i.e., 1313316 + 52900 = 1146^2 + 230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1366213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85381 + ... + 85396.

2^1366216 is an apocalyptic number.

It is an amenable number.

1366216 is a deficient number, since it is larger than the sum of its proper divisors (1195454).

1366216 is a wasteful number, since it uses less digits than its factorization.

1366216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170783 (or 170779 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 1366216 is about 1168.8524286667. The cubic root of 1366216 is about 110.9617052652.

The spelling of 1366216 in words is "one million, three hundred sixty-six thousand, two hundred sixteen".