11643136 has 18 divisors (see below), whose sum is σ = 23241302. Its totient is φ = 5821440.

The previous prime is 11643133. The next prime is 11643161. The reversal of 11643136 is 63134611.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 5089536 = 2560^2 + 2256^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11643136.

It is not an unprimeable number, because it can be changed into a prime (11643133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22485 + ... + 22996.

Almost surely, 2^11643136 is an apocalyptic number.

11643136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11643136 is a deficient number, since it is larger than the sum of its proper divisors (11598166).

11643136 is an frugal number, since it uses more digits than its factorization.

11643136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45497 (or 45483 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 11643136 is about 3412.2039798347. The cubic root of 11643136 is about 226.6504871189.

Adding to 11643136 its reverse (63134611), we get a palindrome (74777747).

The spelling of 11643136 in words is "eleven million, six hundred forty-three thousand, one hundred thirty-six".