1215366 has 16 divisors (see below), whose sum is σ = 2536704. Its totient is φ = 387464.

The previous prime is 1215359. The next prime is 1215367. The reversal of 1215366 is 6635121.

It is a super-2 number, since 2×1215366² = 2954229027912, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266 + ... + 4541.

It is an arithmetic number, because the mean of its divisors is an integer number (158544).

2^1215366 is an apocalyptic number.

1215366 is an abundant number, since it is smaller than the sum of its proper divisors (1321338).

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

1215366 is a wasteful number, since it uses less digits than its factorization.

1215366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835.

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

The square root of 1215366 is about 1102.4363927230. The cubic root of 1215366 is about 106.7175126512.

The spelling of 1215366 in words is "one million, two hundred fifteen thousand, three hundred sixty-six".