1812103 has 2 divisors, whose sum is σ = 1812104. Its totient is φ = 1812102.

The previous prime is 1812091. The next prime is 1812121. The reversal of 1812103 is 3012181.

It is a weak prime.

It is an emirp because it is prime and its reverse (3012181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812103 is a prime.

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

1812103 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906051 + 906052.

It is an arithmetic number, because the mean of its divisors is an integer number (906052).

2^1812103 is an apocalyptic number.

1812103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812103 is an equidigital number, since it uses as much as digits as its factorization.

1812103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1812103 is about 1346.1437516105. The cubic root of 1812103 is about 121.9160714523.

Adding to 1812103 its reverse (3012181), we get a palindrome (4824284).

It can be divided in two parts, 18 and 12103, that added together give a palindrome (12121).

The spelling of 1812103 in words is "one million, eight hundred twelve thousand, one hundred three".