133865724 has 12 divisors (see below), whose sum is σ = 312353384. Its totient is φ = 44621904.

The previous prime is 133865717. The next prime is 133865761. The reversal of 133865724 is 427568331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 5577727 + ... + 5577750.

Almost surely, 2^133865724 is an apocalyptic number.

It is an amenable number.

133865724 is an abundant number, since it is smaller than the sum of its proper divisors (178487660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133865724 is a wasteful number, since it uses less digits than its factorization.

133865724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11155484 (or 11155482 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 133865724 is about 11570.0356092797. The cubic root of 133865724 is about 511.5520119031.

It can be divided in two parts, 13386 and 5724, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 133865724 in words is "one hundred thirty-three million, eight hundred sixty-five thousand, seven hundred twenty-four".