135143520 has 48 divisors (see below), whose sum is σ = 425703600. Its totient is φ = 36038144.

The previous prime is 135143479. The next prime is 135143521. The reversal of 135143520 is 25341531.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135143521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140295 + ... + 141254.

It is an arithmetic number, because the mean of its divisors is an integer number (8868825).

Almost surely, 2^135143520 is an apocalyptic number.

135143520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135143520 is an abundant number, since it is smaller than the sum of its proper divisors (290560080).

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

135143520 is a wasteful number, since it uses less digits than its factorization.

135143520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281567 (or 281559 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 135143520 is about 11625.1245154622. The cubic root of 135143520 is about 513.1745090631.

The spelling of 135143520 in words is "one hundred thirty-five million, one hundred forty-three thousand, five hundred twenty".