135520145 has 8 divisors (see below), whose sum is σ = 162729000. Its totient is φ = 108346240.

The previous prime is 135520123. The next prime is 135520157. The reversal of 135520145 is 541025531.

135520145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2163841 + 133356304 = 1471^2 + 11548^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135520145 - 2⁶ = 135520081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731 + ... + 16479.

It is an arithmetic number, because the mean of its divisors is an integer number (20341125).

Almost surely, 2^135520145 is an apocalyptic number.

It is an amenable number.

135520145 is a deficient number, since it is larger than the sum of its proper divisors (27208855).

135520145 is a wasteful number, since it uses less digits than its factorization.

135520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17475.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 135520145 is about 11641.3119965062. The cubic root of 135520145 is about 513.6507807201.

Adding to 135520145 its reverse (541025531), we get a palindrome (676545676).

The spelling of 135520145 in words is "one hundred thirty-five million, five hundred twenty thousand, one hundred forty-five".