1216266 has 32 divisors (see below), whose sum is σ = 2626560. Its totient is φ = 374256.

The previous prime is 1216249. The next prime is 1216273. The reversal of 1216266 is 6626121.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5245 + ... + 5471.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^1216266 is an apocalyptic number.

1216266 is the 698-th centered pentagonal number.

1216266 is an abundant number, since it is smaller than the sum of its proper divisors (1410294).

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

1216266 is a wasteful number, since it uses less digits than its factorization.

1216266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298.

The product of its digits is 864, while the sum is 24.

The square root of 1216266 is about 1102.8445039986. The cubic root of 1216266 is about 106.7438482196.

The spelling of 1216266 in words is "one million, two hundred sixteen thousand, two hundred sixty-six".