11550001 has 4 divisors (see below), whose sum is σ = 11584612. Its totient is φ = 11515392.

The previous prime is 11549983. The next prime is 11550029. The reversal of 11550001 is 10005511.

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 7160976 + 4389025 = 2676^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 11550001 - 2⁷ = 11549873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11550041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16800 + ... + 17473.

It is an arithmetic number, because the mean of its divisors is an integer number (2896153).

Almost surely, 2^11550001 is an apocalyptic number.

It is an amenable number.

11550001 is a deficient number, since it is larger than the sum of its proper divisors (34611).

11550001 is an equidigital number, since it uses as much as digits as its factorization.

11550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34610.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 11550001 is about 3398.5292407158. The cubic root of 11550001 is about 226.0445326920.

Adding to 11550001 its reverse (10005511), we get a palindrome (21555512).

The spelling of 11550001 in words is "eleven million, five hundred fifty thousand, one".