133741520 has 80 divisors (see below), whose sum is σ = 340960320. Its totient is φ = 48384000.

The previous prime is 133741459. The next prime is 133741523. The reversal of 133741520 is 25147331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 133741520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133741523) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 333320 + ... + 333720.

It is an arithmetic number, because the mean of its divisors is an integer number (4262004).

Almost surely, 2^133741520 is an apocalyptic number.

133741520 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 133741520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170480160).

133741520 is an abundant number, since it is smaller than the sum of its proper divisors (207218800).

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

133741520 is a wasteful number, since it uses less digits than its factorization.

133741520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 133741520 is about 11564.6668780385. Note that the first 3 decimals coincide. The cubic root of 133741520 is about 511.3937526547.

Adding to 133741520 its reverse (25147331), we get a palindrome (158888851).

The spelling of 133741520 in words is "one hundred thirty-three million, seven hundred forty-one thousand, five hundred twenty".