133500420 has 48 divisors (see below), whose sum is σ = 415336320. Its totient is φ = 35599968.

The previous prime is 133500407. The next prime is 133500491. The reversal of 133500420 is 24005331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 133500393 and 133500402.

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, 123072 + ... + 124151.

It is an arithmetic number, because the mean of its divisors is an integer number (8652840).

Almost surely, 2^133500420 is an apocalyptic number.

133500420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133500420 is an abundant number, since it is smaller than the sum of its proper divisors (281835900).

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

133500420 is a wasteful number, since it uses less digits than its factorization.

133500420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247241 (or 247233 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 133500420 is about 11554.2381834546. The cubic root of 133500420 is about 511.0862659981.

Adding to 133500420 its reverse (24005331), we get a palindrome (157505751).

The spelling of 133500420 in words is "one hundred thirty-three million, five hundred thousand, four hundred twenty".