135523141 has 4 divisors (see below), whose sum is σ = 145948012. Its totient is φ = 125098272.

The previous prime is 135523139. The next prime is 135523169. The reversal of 135523141 is 141325531.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62489025 + 73034116 = 7905^2 + 8546^2 .

It is not a de Polignac number, because 135523141 - 2¹ = 135523139 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 (135523741) 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, 5212416 + ... + 5212441.

It is an arithmetic number, because the mean of its divisors is an integer number (36487003).

Almost surely, 2^135523141 is an apocalyptic number.

It is an amenable number.

135523141 is a deficient number, since it is larger than the sum of its proper divisors (10424871).

135523141 is a wasteful number, since it uses less digits than its factorization.

135523141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10424870.

The product of its digits is 1800, while the sum is 25.

The square root of 135523141 is about 11641.4406754491. The cubic root of 135523141 is about 513.6545658557.

Adding to 135523141 its reverse (141325531), we get a palindrome (276848672).

The spelling of 135523141 in words is "one hundred thirty-five million, five hundred twenty-three thousand, one hundred forty-one".