133447120 has 20 divisors (see below), whose sum is σ = 310264740. Its totient is φ = 53378816.

The previous prime is 133447117. The next prime is 133447141. The reversal of 133447120 is 21744331.

It can be written as a sum of positive squares in 2 ways, for example, as 43349056 + 90098064 = 6584^2 + 9492^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833965 + ... + 834124.

It is an arithmetic number, because the mean of its divisors is an integer number (15513237).

Almost surely, 2^133447120 is an apocalyptic number.

133447120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133447120 is an abundant number, since it is smaller than the sum of its proper divisors (176817620).

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

133447120 is a wasteful number, since it uses less digits than its factorization.

133447120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668102 (or 1668096 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 133447120 is about 11551.9314402398. The cubic root of 133447120 is about 511.0182399347.

The spelling of 133447120 in words is "one hundred thirty-three million, four hundred forty-seven thousand, one hundred twenty".