321201225 has 18 divisors (see below), whose sum is σ = 575307486. Its totient is φ = 171307200.

The previous prime is 321201217. The next prime is 321201229. The reversal of 321201225 is 522102123.

It can be written as a sum of positive squares in 3 ways, for example, as 4076361 + 317124864 = 2019^2 + 17808^2 .

It is not a de Polignac number, because 321201225 - 2³ = 321201217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321201198 and 321201207.

It is not an unprimeable number, because it can be changed into a prime (321201229) 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 17 ways as a sum of consecutive naturals, for example, 713556 + ... + 714005.

It is an arithmetic number, because the mean of its divisors is an integer number (31961527).

Almost surely, 2^321201225 is an apocalyptic number.

It is an amenable number.

321201225 is a deficient number, since it is larger than the sum of its proper divisors (254106261).

321201225 is a wasteful number, since it uses less digits than its factorization.

321201225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427577 (or 1427569 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 321201225 is about 17922.0876295146. The cubic root of 321201225 is about 684.8451707539.

Adding to 321201225 its reverse (522102123), we get a palindrome (843303348).

The spelling of 321201225 in words is "three hundred twenty-one million, two hundred one thousand, two hundred twenty-five".