1215956 has 12 divisors (see below), whose sum is σ = 2431968. Its totient is φ = 521112.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215956 is 6595121.

1215956 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

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, 21686 + ... + 21741.

It is an arithmetic number, because the mean of its divisors is an integer number (202664).

2^1215956 is an apocalyptic number.

It is an amenable number.

1215956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1215956 is a wasteful number, since it uses less digits than its factorization.

1215956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43438 (or 43436 counting only the distinct ones).

The product of its digits is 2700, while the sum is 29.

The square root of 1215956 is about 1102.7039493899. The cubic root of 1215956 is about 106.7347785466.

The spelling of 1215956 in words is "one million, two hundred fifteen thousand, nine hundred fifty-six".