11616321 has 16 divisors (see below), whose sum is σ = 16784064. Its totient is φ = 7117824.

The previous prime is 11616317. The next prime is 11616323. The reversal of 11616321 is 12361611.

11616321 = T₁₀₈ + T₁₀₉ + ... + T₄₁₃.

It is not a de Polignac number, because 11616321 - 2² = 11616317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11616323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456 + ... + 4841.

It is an arithmetic number, because the mean of its divisors is an integer number (1049004).

Almost surely, 2^11616321 is an apocalyptic number.

It is an amenable number.

11616321 is a deficient number, since it is larger than the sum of its proper divisors (5167743).

11616321 is a wasteful number, since it uses less digits than its factorization.

11616321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360.

The product of its digits is 216, while the sum is 21.

The square root of 11616321 is about 3408.2724362938. The cubic root of 11616321 is about 226.4763557813.

Adding to 11616321 its reverse (12361611), we get a palindrome (23977932).

It can be divided in two parts, 1161 and 6321, that multiplied together give a square (7338681 = 2709²).

The spelling of 11616321 in words is "eleven million, six hundred sixteen thousand, three hundred twenty-one".