135821527 has 4 divisors (see below), whose sum is σ = 135887920. Its totient is φ = 135755136.

The previous prime is 135821489. The next prime is 135821573. The reversal of 135821527 is 725128531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135821527 - 2¹¹ = 135819479 is a prime.

It is a super-2 number, since 2×135821527² = 36894974393223458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135821492 and 135821501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135821227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30027 + ... + 34252.

It is an arithmetic number, because the mean of its divisors is an integer number (33971980).

Almost surely, 2^135821527 is an apocalyptic number.

135821527 is a deficient number, since it is larger than the sum of its proper divisors (66393).

135821527 is an equidigital number, since it uses as much as digits as its factorization.

135821527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66392.

The product of its digits is 16800, while the sum is 34.

The square root of 135821527 is about 11654.2493108737. The cubic root of 135821527 is about 514.0312665502.

The spelling of 135821527 in words is "one hundred thirty-five million, eight hundred twenty-one thousand, five hundred twenty-seven".