133024421 has 4 divisors (see below), whose sum is σ = 137611500. Its totient is φ = 128437344.

The previous prime is 133024417. The next prime is 133024427. The reversal of 133024421 is 124420331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66422500 + 66601921 = 8150^2 + 8161^2 .

It is a cyclic number.

It is not a de Polignac number, because 133024421 - 2² = 133024417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133024393 and 133024402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133024427) 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 3 ways as a sum of consecutive naturals, for example, 2293496 + ... + 2293553.

It is an arithmetic number, because the mean of its divisors is an integer number (34402875).

Almost surely, 2^133024421 is an apocalyptic number.

It is an amenable number.

133024421 is a deficient number, since it is larger than the sum of its proper divisors (4587079).

133024421 is an equidigital number, since it uses as much as digits as its factorization.

133024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587078.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 133024421 is about 11533.6213307010. The cubic root of 133024421 is about 510.4781124512.

Adding to 133024421 its reverse (124420331), we get a palindrome (257444752).

The spelling of 133024421 in words is "one hundred thirty-three million, twenty-four thousand, four hundred twenty-one".