11597221 has 8 divisors (see below), whose sum is σ = 12139200. Its totient is φ = 11058432.

The previous prime is 11597207. The next prime is 11597227. The reversal of 11597221 is 12279511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11597221 - 2⁵ = 11597189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11597221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11597227) 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 7 ways as a sum of consecutive naturals, for example, 9766 + ... + 10888.

It is an arithmetic number, because the mean of its divisors is an integer number (1517400).

Almost surely, 2^11597221 is an apocalyptic number.

It is an amenable number.

11597221 is a deficient number, since it is larger than the sum of its proper divisors (541979).

11597221 is a wasteful number, since it uses less digits than its factorization.

11597221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595.

The product of its digits is 1260, while the sum is 28.

The square root of 11597221 is about 3405.4692775005. The cubic root of 11597221 is about 226.3521606542.

It can be divided in two parts, 115 and 97221, that added together give a cube (97336 = 46³).

The spelling of 11597221 in words is "eleven million, five hundred ninety-seven thousand, two hundred twenty-one".