11139905 has 24 divisors (see below), whose sum is σ = 15944040. Its totient is φ = 7445760.

The previous prime is 11139901. The next prime is 11139917. The reversal of 11139905 is 50993111.

It can be written as a sum of positive squares in 4 ways, for example, as 906304 + 10233601 = 952^2 + 3199^2 .

It is not a de Polignac number, because 11139905 - 2² = 11139901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11139901) 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 23 ways as a sum of consecutive naturals, for example, 9491 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (664335).

Almost surely, 2^11139905 is an apocalyptic number.

It is an amenable number.

11139905 is a deficient number, since it is larger than the sum of its proper divisors (4804135).

11139905 is a wasteful number, since it uses less digits than its factorization.

11139905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 11139905 is about 3337.6496221143. The cubic root of 11139905 is about 223.3369062075.

The spelling of 11139905 in words is "eleven million, one hundred thirty-nine thousand, nine hundred five".