133235421 has 8 divisors (see below), whose sum is σ = 193797024. Its totient is φ = 80748720.

The previous prime is 133235369. The next prime is 133235471. The reversal of 133235421 is 124532331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133235421 - 2⁹ = 133234909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133235391 and 133235400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133235471) 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, 2018686 + ... + 2018751.

It is an arithmetic number, because the mean of its divisors is an integer number (24224628).

Almost surely, 2^133235421 is an apocalyptic number.

133235421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133235421 is a deficient number, since it is larger than the sum of its proper divisors (60561603).

133235421 is a wasteful number, since it uses less digits than its factorization.

133235421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037451.

The product of its digits is 2160, while the sum is 24.

The square root of 133235421 is about 11542.7648767529. The cubic root of 133235421 is about 510.7478723986.

Adding to 133235421 its reverse (124532331), we get a palindrome (257767752).

The spelling of 133235421 in words is "one hundred thirty-three million, two hundred thirty-five thousand, four hundred twenty-one".