1216678 has 4 divisors (see below), whose sum is σ = 1825020. Its totient is φ = 608338.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216678 is 8766121.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304168 + ... + 304171.

It is an arithmetic number, because the mean of its divisors is an integer number (456255).

2^1216678 is an apocalyptic number.

1216678 is a deficient number, since it is larger than the sum of its proper divisors (608342).

1216678 is an equidigital number, since it uses as much as digits as its factorization.

1216678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608341.

The product of its digits is 4032, while the sum is 31.

The square root of 1216678 is about 1103.0312778883. The cubic root of 1216678 is about 106.7558997227.

The spelling of 1216678 in words is "one million, two hundred sixteen thousand, six hundred seventy-eight".