12221759 has 8 divisors (see below), whose sum is σ = 14117328. Its totient is φ = 10456960.

The previous prime is 12221749. The next prime is 12221771. The reversal of 12221759 is 95712221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32492 + ... + 32865.

It is an arithmetic number, because the mean of its divisors is an integer number (1764666).

Almost surely, 2^12221759 is an apocalyptic number.

12221759 is a deficient number, since it is larger than the sum of its proper divisors (1895569).

12221759 is a wasteful number, since it uses less digits than its factorization.

12221759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65385.

The product of its digits is 2520, while the sum is 29.

The square root of 12221759 is about 3495.9632435139. The cubic root of 12221759 is about 230.3445309076.

The spelling of 12221759 in words is "twelve million, two hundred twenty-one thousand, seven hundred fifty-nine".