133423120 has 20 divisors (see below), whose sum is σ = 310208940. Its totient is φ = 53369216.

The previous prime is 133423099. The next prime is 133423133. The reversal of 133423120 is 21324331.

It can be written as a sum of positive squares in 2 ways, for example, as 83466496 + 49956624 = 9136^2 + 7068^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 833815 + ... + 833974.

It is an arithmetic number, because the mean of its divisors is an integer number (15510447).

Almost surely, 2^133423120 is an apocalyptic number.

133423120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133423120 is an abundant number, since it is smaller than the sum of its proper divisors (176785820).

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

133423120 is a wasteful number, since it uses less digits than its factorization.

133423120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667802 (or 1667796 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133423120 is about 11550.8926062015. The cubic root of 133423120 is about 510.9876031475.

Adding to 133423120 its reverse (21324331), we get a palindrome (154747451).

The spelling of 133423120 in words is "one hundred thirty-three million, four hundred twenty-three thousand, one hundred twenty".