11275005 has 32 divisors (see below), whose sum is σ = 20772864. Its totient is φ = 5115456.

The previous prime is 11275001. The next prime is 11275021. The reversal of 11275005 is 50057211.

It is not a de Polignac number, because 11275005 - 2² = 11275001 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 (11275001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 17214 + ... + 17856.

It is an arithmetic number, because the mean of its divisors is an integer number (649152).

Almost surely, 2^11275005 is an apocalyptic number.

11275005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11275005 is a deficient number, since it is larger than the sum of its proper divisors (9497859).

11275005 is a wasteful number, since it uses less digits than its factorization.

11275005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 11275005 is about 3357.8274226053. The cubic root of 11275005 is about 224.2361256329.

The spelling of 11275005 in words is "eleven million, two hundred seventy-five thousand, five".