133561012 has 12 divisors (see below), whose sum is σ = 251711236. Its totient is φ = 61643520.

The previous prime is 133560997. The next prime is 133561031. The reversal of 133561012 is 210165331.

It is a happy number.

133561012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13351716 + 120209296 = 3654^2 + 10964^2 .

It is a congruent number.

It is an unprimeable number.

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, 1284189 + ... + 1284292.

Almost surely, 2^133561012 is an apocalyptic number.

It is an amenable number.

133561012 is a deficient number, since it is larger than the sum of its proper divisors (118150224).

133561012 is a wasteful number, since it uses less digits than its factorization.

133561012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568498 (or 2568496 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 133561012 is about 11556.8599541571. The cubic root of 133561012 is about 511.1635767538.

The spelling of 133561012 in words is "one hundred thirty-three million, five hundred sixty-one thousand, twelve".