1209916 has 12 divisors (see below), whose sum is σ = 2134440. Its totient is φ = 600080.

The previous prime is 1209889. The next prime is 1209931. The reversal of 1209916 is 6199021.

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, 631 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (177870).

2^1209916 is an apocalyptic number.

It is an amenable number.

1209916 is a deficient number, since it is larger than the sum of its proper divisors (924524).

1209916 is a wasteful number, since it uses less digits than its factorization.

1209916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1209916 is about 1099.9618175191. The cubic root of 1209916 is about 106.5577577632.

The spelling of 1209916 in words is "one million, two hundred nine thousand, nine hundred sixteen".