320121 has 6 divisors (see below), whose sum is σ = 462410. Its totient is φ = 213408.

The previous prime is 320119. The next prime is 320141. The reversal of 320121 is 121023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 318096 + 2025 = 564^2 + 45^2 .

It is not a de Polignac number, because 320121 - 2¹ = 320119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 35569 = 320121 / (3 + 2 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320121.

It is not an unprimeable number, because it can be changed into a prime (320101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17776 + ... + 17793.

2³²⁰¹²¹ is an apocalyptic number.

It is an amenable number.

320121 is a deficient number, since it is larger than the sum of its proper divisors (142289).

320121 is a wasteful number, since it uses less digits than its factorization.

320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35575 (or 35572 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 320121 is about 565.7923647417. The cubic root of 320121 is about 68.4076579094.

Adding to 320121 its reverse (121023), we get a palindrome (441144).

It can be divided in two parts, 320 and 121, that added together give a square (441 = 21²).

The spelling of 320121 in words is "three hundred twenty thousand, one hundred twenty-one", and thus it is an iban number.