1187103 has 4 divisors (see below), whose sum is σ = 1582808. Its totient is φ = 791400.

The previous prime is 1187089. The next prime is 1187107. The reversal of 1187103 is 3017811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3017811 = 3 ⋅1005937.

It is not a de Polignac number, because 1187103 - 2⁸ = 1186847 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1187103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187107) 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, 197848 + ... + 197853.

It is an arithmetic number, because the mean of its divisors is an integer number (395702).

2^1187103 is an apocalyptic number.

1187103 is a deficient number, since it is larger than the sum of its proper divisors (395705).

1187103 is an equidigital number, since it uses as much as digits as its factorization.

1187103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395704.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1187103 is about 1089.5425645655. The cubic root of 1187103 is about 105.8837874352.

The spelling of 1187103 in words is "one million, one hundred eighty-seven thousand, one hundred three".