11645138 has 18 divisors (see below), whose sum is σ = 18581751. Its totient is φ = 5472684.

The previous prime is 11645113. The next prime is 11645147. The reversal of 11645138 is 83154611.

It can be written as a sum of positive squares in only one way, i.e., 5822569 + 5822569 = 2413^2 + 2413^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2413.

It is a self number, because there is not a number n which added to its sum of digits gives 11645138.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 91631 + ... + 91757.

Almost surely, 2^11645138 is an apocalyptic number.

11645138 is a deficient number, since it is larger than the sum of its proper divisors (6936613).

11645138 is an equidigital number, since it uses as much as digits as its factorization.

11645138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 148 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 11645138 is about 3412.4973260063. The cubic root of 11645138 is about 226.6634769832.

Adding to 11645138 its reverse (83154611), we get a palindrome (94799749).

It can be divided in two parts, 116 and 45138, that added together give a palindrome (45254).

The spelling of 11645138 in words is "eleven million, six hundred forty-five thousand, one hundred thirty-eight".