11503601 has 2 divisors, whose sum is σ = 11503602. Its totient is φ = 11503600.

The previous prime is 11503571. The next prime is 11503603. The reversal of 11503601 is 10630511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7507600 + 3996001 = 2740^2 + 1999^2 .

It is a cyclic number.

It is not a de Polignac number, because 11503601 - 2⁶ = 11503537 is a prime.

It is a Sophie Germain prime.

Together with 11503603, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11503601.

It is not a weakly prime, because it can be changed into another prime (11503603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751800 + 5751801.

It is an arithmetic number, because the mean of its divisors is an integer number (5751801).

Almost surely, 2^11503601 is an apocalyptic number.

It is an amenable number.

11503601 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503601 is an equidigital number, since it uses as much as digits as its factorization.

11503601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 11503601 is about 3391.6958884900. The cubic root of 11503601 is about 225.7414290268.

The spelling of 11503601 in words is "eleven million, five hundred three thousand, six hundred one".