11399945 has 16 divisors (see below), whose sum is σ = 14826240. Its totient is φ = 8381184.

The previous prime is 11399939. The next prime is 11399957. The reversal of 11399945 is 54999311.

It is a cyclic number.

It is not a de Polignac number, because 11399945 - 2¹⁰ = 11398921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096 + ... + 5214.

It is an arithmetic number, because the mean of its divisors is an integer number (926640).

Almost surely, 2^11399945 is an apocalyptic number.

It is an amenable number.

11399945 is a deficient number, since it is larger than the sum of its proper divisors (3426295).

11399945 is a wasteful number, since it uses less digits than its factorization.

11399945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

The product of its digits is 43740, while the sum is 41.

The square root of 11399945 is about 3376.3804584199. The cubic root of 11399945 is about 225.0613495258.

The spelling of 11399945 in words is "eleven million, three hundred ninety-nine thousand, nine hundred forty-five".