133304021 has 8 divisors (see below), whose sum is σ = 147282624. Its totient is φ = 120007360.

The previous prime is 133304011. The next prime is 133304027. The reversal of 133304021 is 120403331.

It is a happy number.

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 133304021 - 2¹⁸ = 133041877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133304027) 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, 170075 + ... + 170856.

It is an arithmetic number, because the mean of its divisors is an integer number (18410328).

Almost surely, 2^133304021 is an apocalyptic number.

It is an amenable number.

133304021 is a deficient number, since it is larger than the sum of its proper divisors (13978603).

133304021 is a wasteful number, since it uses less digits than its factorization.

133304021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340971.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133304021 is about 11545.7360527599. The cubic root of 133304021 is about 510.8355149894.

Adding to 133304021 its reverse (120403331), we get a palindrome (253707352).

The spelling of 133304021 in words is "one hundred thirty-three million, three hundred four thousand, twenty-one".