1216383 has 8 divisors (see below), whose sum is σ = 1853568. Its totient is φ = 695064.

The previous prime is 1216379. The next prime is 1216387. The reversal of 1216383 is 3836121.

It is an interprime number because it is at equal distance from previous prime (1216379) and next prime (1216387).

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

It is not a de Polignac number, because 1216383 - 2² = 1216379 is a prime.

It is an alternating number because its digits alternate between odd and even.

1216383 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28941 + ... + 28982.

It is an arithmetic number, because the mean of its divisors is an integer number (231696).

2^1216383 is an apocalyptic number.

1216383 is a deficient number, since it is larger than the sum of its proper divisors (637185).

1216383 is an equidigital number, since it uses as much as digits as its factorization.

1216383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57933.

The product of its digits is 864, while the sum is 24.

The square root of 1216383 is about 1102.8975473724. The cubic root of 1216383 is about 106.7472708891.

It can be divided in two parts, 12163 and 83, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1216383 in words is "one million, two hundred sixteen thousand, three hundred eighty-three".