11551071 has 16 divisors (see below), whose sum is σ = 17650944. Its totient is φ = 6582144.

The previous prime is 11551013. The next prime is 11551081. The reversal of 11551071 is 17015511.

It is a happy number.

11551071 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11551071 - 2⁷ = 11550943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551081) 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 15 ways as a sum of consecutive naturals, for example, 11335 + ... + 12311.

It is an arithmetic number, because the mean of its divisors is an integer number (1103184).

Almost surely, 2^11551071 is an apocalyptic number.

11551071 is a deficient number, since it is larger than the sum of its proper divisors (6099873).

11551071 is an equidigital number, since it uses as much as digits as its factorization.

11551071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 175, while the sum is 21.

The square root of 11551071 is about 3398.6866581078. The cubic root of 11551071 is about 226.0515127832.

Adding to 11551071 its reverse (17015511), we get a palindrome (28566582).

The spelling of 11551071 in words is "eleven million, five hundred fifty-one thousand, seventy-one".