11203145 has 4 divisors (see below), whose sum is σ = 13443780. Its totient is φ = 8962512.

The previous prime is 11203123. The next prime is 11203151. The reversal of 11203145 is 54130211.

11203145 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 6091024 = 2261^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 11203145 - 2⁶ = 11203081 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120310 + ... + 1120319.

It is an arithmetic number, because the mean of its divisors is an integer number (3360945).

Almost surely, 2^11203145 is an apocalyptic number.

It is an amenable number.

11203145 is a deficient number, since it is larger than the sum of its proper divisors (2240635).

11203145 is an equidigital number, since it uses as much as digits as its factorization.

11203145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240634.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11203145 is about 3347.1099474024. The cubic root of 11203145 is about 223.7587285797.

Adding to 11203145 its reverse (54130211), we get a palindrome (65333356).

The spelling of 11203145 in words is "eleven million, two hundred three thousand, one hundred forty-five".