134133821 has 4 divisors (see below), whose sum is σ = 134205852. Its totient is φ = 134061792.

The previous prime is 134133803. The next prime is 134133833. The reversal of 134133821 is 128331431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128331431 = 59 ⋅2175109.

It can be written as a sum of positive squares in 2 ways, for example, as 87703225 + 46430596 = 9365^2 + 6814^2 .

It is a cyclic number.

It is not a de Polignac number, because 134133821 - 2¹⁰ = 134132797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134133871) 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 3 ways as a sum of consecutive naturals, for example, 33146 + ... + 36971.

It is an arithmetic number, because the mean of its divisors is an integer number (33551463).

Almost surely, 2^134133821 is an apocalyptic number.

It is an amenable number.

134133821 is a deficient number, since it is larger than the sum of its proper divisors (72031).

134133821 is an equidigital number, since it uses as much as digits as its factorization.

134133821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72030.

The product of its digits is 1728, while the sum is 26.

The square root of 134133821 is about 11581.6156472230. The cubic root of 134133821 is about 511.8932844911.

The spelling of 134133821 in words is "one hundred thirty-four million, one hundred thirty-three thousand, eight hundred twenty-one".