133401321 has 6 divisors (see below), whose sum is σ = 192690810. Its totient is φ = 88934208.

The previous prime is 133401313. The next prime is 133401341. The reversal of 133401321 is 123104331.

133401321 is a `hidden beast` number, since 1 + 3 + 340 + 1 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 122412096 + 10989225 = 11064^2 + 3315^2 .

It is not a de Polignac number, because 133401321 - 2³ = 133401313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133401294 and 133401303.

It is not an unprimeable number, because it can be changed into a prime (133401341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7411176 + ... + 7411193.

It is an arithmetic number, because the mean of its divisors is an integer number (32115135).

Almost surely, 2^133401321 is an apocalyptic number.

It is an amenable number.

133401321 is a deficient number, since it is larger than the sum of its proper divisors (59289489).

133401321 is a wasteful number, since it uses less digits than its factorization.

133401321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822375 (or 14822372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133401321 is about 11549.9489609262. The cubic root of 133401321 is about 510.9597728248.

Adding to 133401321 its reverse (123104331), we get a palindrome (256505652).

The spelling of 133401321 in words is "one hundred thirty-three million, four hundred one thousand, three hundred twenty-one".