133646242 has 8 divisors (see below), whose sum is σ = 203755932. Its totient is φ = 65727600.

The previous prime is 133646221. The next prime is 133646251. The reversal of 133646242 is 242646331.

It can be written as a sum of positive squares in 2 ways, for example, as 84070561 + 49575681 = 9169^2 + 7041^2 .

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

It is a super-2 number, since 2×133646242² = 35722636001445128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547609 + ... + 547852.

Almost surely, 2^133646242 is an apocalyptic number.

133646242 is a deficient number, since it is larger than the sum of its proper divisors (70109690).

133646242 is a wasteful number, since it uses less digits than its factorization.

133646242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095524.

The product of its digits is 20736, while the sum is 31.

The square root of 133646242 is about 11560.5467863765. The cubic root of 133646242 is about 511.2722841457.

The spelling of 133646242 in words is "one hundred thirty-three million, six hundred forty-six thousand, two hundred forty-two".