162404321 has 16 divisors (see below), whose sum is σ = 173532240. Its totient is φ = 151710720.

The previous prime is 162404309. The next prime is 162404339. The reversal of 162404321 is 123404261.

It can be written as a sum of positive squares in 8 ways, for example, as 96721 + 162307600 = 311^2 + 12740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162404321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162404351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162395 + ... + 163391.

It is an arithmetic number, because the mean of its divisors is an integer number (10845765).

Almost surely, 2^162404321 is an apocalyptic number.

It is an amenable number.

162404321 is a deficient number, since it is larger than the sum of its proper divisors (11127919).

162404321 is a wasteful number, since it uses less digits than its factorization.

162404321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 162404321 is about 12743.7953922683. The cubic root of 162404321 is about 545.5893196013.

Adding to 162404321 its reverse (123404261), we get a palindrome (285808582).

The spelling of 162404321 in words is "one hundred sixty-two million, four hundred four thousand, three hundred twenty-one".