133155421 has 8 divisors (see below), whose sum is σ = 152297600. Its totient is φ = 114043248.

The previous prime is 133155419. The next prime is 133155427. The reversal of 133155421 is 124551331.

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 133155421 - 2¹ = 133155419 is a prime.

It is a super-2 number, since 2×133155421² = 35460732283374482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133155427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995 + ... + 16591.

It is an arithmetic number, because the mean of its divisors is an integer number (19037200).

Almost surely, 2^133155421 is an apocalyptic number.

It is an amenable number.

133155421 is a deficient number, since it is larger than the sum of its proper divisors (19142179).

133155421 is a wasteful number, since it uses less digits than its factorization.

133155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15003.

The product of its digits is 1800, while the sum is 25.

The square root of 133155421 is about 11539.2989821739. The cubic root of 133155421 is about 510.6456272894.

The spelling of 133155421 in words is "one hundred thirty-three million, one hundred fifty-five thousand, four hundred twenty-one".