133602420 has 144 divisors (see below), whose sum is σ = 450455040. Its totient is φ = 29465856.

The previous prime is 133602407. The next prime is 133602437. The reversal of 133602420 is 24206331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84477 + ... + 86043.

It is an arithmetic number, because the mean of its divisors is an integer number (3128160).

Almost surely, 2^133602420 is an apocalyptic number.

133602420 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 133602420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225227520).

133602420 is an abundant number, since it is smaller than the sum of its proper divisors (316852620).

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

133602420 is a wasteful number, since it uses less digits than its factorization.

133602420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133602420 is about 11558.6513054076. The cubic root of 133602420 is about 511.2163967448.

Adding to 133602420 its reverse (24206331), we get a palindrome (157808751).

The spelling of 133602420 in words is "one hundred thirty-three million, six hundred two thousand, four hundred twenty".