1216103 has 4 divisors (see below), whose sum is σ = 1389840. Its totient is φ = 1042368.

The previous prime is 1216091. The next prime is 1216109. The reversal of 1216103 is 3016121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3016121 = 89 ⋅33889.

It is a cyclic number.

It is not a de Polignac number, because 1216103 - 2⁴ = 1216087 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216109) by changing a digit.

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, 86858 + ... + 86871.

It is an arithmetic number, because the mean of its divisors is an integer number (347460).

2^1216103 is an apocalyptic number.

1216103 is a deficient number, since it is larger than the sum of its proper divisors (173737).

1216103 is an equidigital number, since it uses as much as digits as its factorization.

1216103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173736.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1216103 is about 1102.7706017119. The cubic root of 1216103 is about 106.7390795192.

The spelling of 1216103 in words is "one million, two hundred sixteen thousand, one hundred three".