11556103 has 4 divisors (see below), whose sum is σ = 12445048. Its totient is φ = 10667160.

The previous prime is 11556091. The next prime is 11556113. The reversal of 11556103 is 30165511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30165511 = 31 ⋅973081.

It is a cyclic number.

It is not a de Polignac number, because 11556103 - 2¹⁷ = 11425031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444453 + ... + 444478.

It is an arithmetic number, because the mean of its divisors is an integer number (3111262).

Almost surely, 2^11556103 is an apocalyptic number.

11556103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11556103 is a deficient number, since it is larger than the sum of its proper divisors (888945).

11556103 is an equidigital number, since it uses as much as digits as its factorization.

11556103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888944.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 11556103 is about 3399.4268634580. The cubic root of 11556103 is about 226.0843330033.

The spelling of 11556103 in words is "eleven million, five hundred fifty-six thousand, one hundred three".