133120856 has 32 divisors (see below), whose sum is σ = 274276800. Its totient is φ = 60068640.

The previous prime is 133120853. The next prime is 133120879. The reversal of 133120856 is 658021331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133120853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6791 + ... + 17673.

It is an arithmetic number, because the mean of its divisors is an integer number (8571150).

Almost surely, 2^133120856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133120856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137138400).

133120856 is an abundant number, since it is smaller than the sum of its proper divisors (141155944).

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

133120856 is a wasteful number, since it uses less digits than its factorization.

133120856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039 (or 11035 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 133120856 is about 11537.8011770008. The cubic root of 133120856 is about 510.6014383423.

The spelling of 133120856 in words is "one hundred thirty-three million, one hundred twenty thousand, eight hundred fifty-six".