133321025 has 6 divisors (see below), whose sum is σ = 165318102. Its totient is φ = 106656800.

The previous prime is 133320997. The next prime is 133321039. The reversal of 133321025 is 520123331.

It can be written as a sum of positive squares in 3 ways, for example, as 7612081 + 125708944 = 2759^2 + 11212^2 .

It is not a de Polignac number, because 133321025 - 2⁶ = 133320961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133320988 and 133321006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2666396 + ... + 2666445.

It is an arithmetic number, because the mean of its divisors is an integer number (27553017).

Almost surely, 2^133321025 is an apocalyptic number.

It is an amenable number.

133321025 is a deficient number, since it is larger than the sum of its proper divisors (31997077).

133321025 is an equidigital number, since it uses as much as digits as its factorization.

133321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332851 (or 5332846 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133321025 is about 11546.4724050248. The cubic root of 133321025 is about 510.8572344587.

Adding to 133321025 its reverse (520123331), we get a palindrome (653444356).

The spelling of 133321025 in words is "one hundred thirty-three million, three hundred twenty-one thousand, twenty-five".