320142121 has 8 divisors (see below), whose sum is σ = 346675784. Its totient is φ = 293880960.

The previous prime is 320142089. The next prime is 320142127. The reversal of 320142121 is 121241023.

It can be written as a sum of positive squares in 4 ways, for example, as 43086096 + 277056025 = 6564^2 + 16645^2 .

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 320142121 - 2⁵ = 320142089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320142095 and 320142104.

It is not an unprimeable number, because it can be changed into a prime (320142127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65676 + ... + 70381.

It is an arithmetic number, because the mean of its divisors is an integer number (43334473).

Almost surely, 2^320142121 is an apocalyptic number.

It is an amenable number.

320142121 is a deficient number, since it is larger than the sum of its proper divisors (26533663).

320142121 is a wasteful number, since it uses less digits than its factorization.

320142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136251.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 320142121 is about 17892.5157817452. The cubic root of 320142121 is about 684.0916234717.

Adding to 320142121 its reverse (121241023), we get a palindrome (441383144).

The spelling of 320142121 in words is "three hundred twenty million, one hundred forty-two thousand, one hundred twenty-one".