135257530 has 16 divisors (see below), whose sum is σ = 243701640. Its totient is φ = 54050112.

The previous prime is 135257513. The next prime is 135257543. The reversal of 135257530 is 35752531.

It can be written as a sum of positive squares in 4 ways, for example, as 116186841 + 19070689 = 10779^2 + 4367^2 .

It is a junction number, because it is equal to n+sod(n) for n = 135257492 and 135257501.

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, 5116 + ... + 17224.

Almost surely, 2^135257530 is an apocalyptic number.

135257530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135257530 is a deficient number, since it is larger than the sum of its proper divisors (108444110).

135257530 is a wasteful number, since it uses less digits than its factorization.

135257530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13233.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 135257530 is about 11630.0270850931. The cubic root of 135257530 is about 513.3187768778.

The spelling of 135257530 in words is "one hundred thirty-five million, two hundred fifty-seven thousand, five hundred thirty".