1215868 has 12 divisors (see below), whose sum is σ = 2177560. Its totient is φ = 593712.

The previous prime is 1215859. The next prime is 1215881. The reversal of 1215868 is 8685121.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3363 + ... + 3706.

2^1215868 is an apocalyptic number.

It is an amenable number.

1215868 is a deficient number, since it is larger than the sum of its proper divisors (961692).

1215868 is a wasteful number, since it uses less digits than its factorization.

1215868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116 (or 7114 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 1215868 is about 1102.6640467522. The cubic root of 1215868 is about 106.7322036488.

The spelling of 1215868 in words is "one million, two hundred fifteen thousand, eight hundred sixty-eight".