11503871 has 2 divisors, whose sum is σ = 11503872. Its totient is φ = 11503870.

The previous prime is 11503867. The next prime is 11503889. The reversal of 11503871 is 17830511.

11503871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (17830511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11503871 - 2² = 11503867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11503871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11503801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751935 + 5751936.

It is an arithmetic number, because the mean of its divisors is an integer number (5751936).

Almost surely, 2^11503871 is an apocalyptic number.

11503871 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503871 is an equidigital number, since it uses as much as digits as its factorization.

11503871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 11503871 is about 3391.7356913533. The cubic root of 11503871 is about 225.7431951320.

The spelling of 11503871 in words is "eleven million, five hundred three thousand, eight hundred seventy-one".