133120520 has 64 divisors (see below), whose sum is σ = 328104000. Its totient is φ = 48307968.

The previous prime is 133120513. The next prime is 133120531. The reversal of 133120520 is 25021331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28511 + ... + 32849.

It is an arithmetic number, because the mean of its divisors is an integer number (5126625).

Almost surely, 2^133120520 is an apocalyptic number.

133120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164052000).

133120520 is an abundant number, since it is smaller than the sum of its proper divisors (194983480).

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

133120520 is a wasteful number, since it uses less digits than its factorization.

133120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4418 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 133120520 is about 11537.7866161582. The cubic root of 133120520 is about 510.6010087521.

Adding to 133120520 its reverse (25021331), we get a palindrome (158141851).

It can be divided in two parts, 133120 and 520, that multiplied together give a square (69222400 = 8320²).

The spelling of 133120520 in words is "one hundred thirty-three million, one hundred twenty thousand, five hundred twenty".