1216834 has 8 divisors (see below), whose sum is σ = 1838988. Its totient is φ = 603840.

The previous prime is 1216823. The next prime is 1216841. The reversal of 1216834 is 4386121.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 225 = 1103^2 + 15^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1216799 and 1216808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947 + ... + 2494.

2^1216834 is an apocalyptic number.

1216834 is a deficient number, since it is larger than the sum of its proper divisors (622154).

1216834 is a wasteful number, since it uses less digits than its factorization.

1216834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580.

The product of its digits is 1152, while the sum is 25.

The square root of 1216834 is about 1103.1019898450. The cubic root of 1216834 is about 106.7604622032.

The spelling of 1216834 in words is "one million, two hundred sixteen thousand, eight hundred thirty-four".