133508842 has 4 divisors (see below), whose sum is σ = 200263266. Its totient is φ = 66754420.

The previous prime is 133508831. The next prime is 133508849. The reversal of 133508842 is 248805331.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 85359121 + 48149721 = 9239^2 + 6939^2 .

It is a super-2 number, since 2×133508842² = 35649221784361928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133508798 and 133508807.

It is not an unprimeable number, because it can be changed into a prime (133508849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33377209 + ... + 33377212.

Almost surely, 2^133508842 is an apocalyptic number.

133508842 is a deficient number, since it is larger than the sum of its proper divisors (66754424).

133508842 is an equidigital number, since it uses as much as digits as its factorization.

133508842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66754423.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 133508842 is about 11554.6026327174. The cubic root of 133508842 is about 511.0970132252.

The spelling of 133508842 in words is "one hundred thirty-three million, five hundred eight thousand, eight hundred forty-two".