133044421 has 4 divisors (see below), whose sum is σ = 133081632. Its totient is φ = 133007212.

The previous prime is 133044407. The next prime is 133044427. The reversal of 133044421 is 124440331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124440331 = 2551 ⋅48781.

It is a cyclic number.

It is not a de Polignac number, because 133044421 - 2¹³ = 133036229 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133044392 and 133044401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133044427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12595 + ... + 20608.

It is an arithmetic number, because the mean of its divisors is an integer number (33270408).

Almost surely, 2^133044421 is an apocalyptic number.

It is an amenable number.

133044421 is a deficient number, since it is larger than the sum of its proper divisors (37211).

133044421 is an equidigital number, since it uses as much as digits as its factorization.

133044421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37210.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 133044421 is about 11534.4883284869. The cubic root of 133044421 is about 510.5036943470.

Adding to 133044421 its reverse (124440331), we get a palindrome (257484752).

The spelling of 133044421 in words is "one hundred thirty-three million, forty-four thousand, four hundred twenty-one".