135441557 has 4 divisors (see below), whose sum is σ = 142570080. Its totient is φ = 128313036.

The previous prime is 135441487. The next prime is 135441569. The reversal of 135441557 is 755144531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135441557 - 2²⁰ = 134392981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135441587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3564233 + ... + 3564270.

It is an arithmetic number, because the mean of its divisors is an integer number (35642520).

Almost surely, 2^135441557 is an apocalyptic number.

It is an amenable number.

135441557 is a deficient number, since it is larger than the sum of its proper divisors (7128523).

135441557 is an equidigital number, since it uses as much as digits as its factorization.

135441557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128522.

The product of its digits is 42000, while the sum is 35.

The square root of 135441557 is about 11637.9361142773. The cubic root of 135441557 is about 513.5514729924.

The spelling of 135441557 in words is "one hundred thirty-five million, four hundred forty-one thousand, five hundred fifty-seven".