1215944 has 16 divisors (see below), whose sum is σ = 2353920. Its totient is φ = 588240.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215944 is 4495121.

It is a super-2 number, since 2×1215944² = 2957039622272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2204 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (147120).

2^1215944 is an apocalyptic number.

It is an amenable number.

1215944 is a deficient number, since it is larger than the sum of its proper divisors (1137976).

1215944 is a wasteful number, since it uses less digits than its factorization.

1215944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4940 (or 4936 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1215944 is about 1102.6985082061. The cubic root of 1215944 is about 106.7344274315.

The spelling of 1215944 in words is "one million, two hundred fifteen thousand, nine hundred forty-four".