162601221 has 16 divisors (see below), whose sum is σ = 229227200. Its totient is φ = 102238848.

The previous prime is 162601211. The next prime is 162601249. The reversal of 162601221 is 122106261.

It is not a de Polignac number, because 162601221 - 2⁶ = 162601157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162601211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6825 + ... + 19281.

It is an arithmetic number, because the mean of its divisors is an integer number (14326700).

Almost surely, 2^162601221 is an apocalyptic number.

It is an amenable number.

162601221 is a deficient number, since it is larger than the sum of its proper divisors (66625979).

162601221 is a wasteful number, since it uses less digits than its factorization.

162601221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12708.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 162601221 is about 12751.5183801773. The cubic root of 162601221 is about 545.8097225043.

Adding to 162601221 its reverse (122106261), we get a palindrome (284707482).

The spelling of 162601221 in words is "one hundred sixty-two million, six hundred one thousand, two hundred twenty-one".