135136445 has 4 divisors (see below), whose sum is σ = 162163740. Its totient is φ = 108109152.

The previous prime is 135136429. The next prime is 135136447. The reversal of 135136445 is 544631531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544631531 = 3343 ⋅162917.

It can be written as a sum of positive squares in 2 ways, for example, as 51998521 + 83137924 = 7211^2 + 9118^2 .

It is a cyclic number.

It is not a de Polignac number, because 135136445 - 2⁴ = 135136429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135136447) 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, 13513640 + ... + 13513649.

It is an arithmetic number, because the mean of its divisors is an integer number (40540935).

Almost surely, 2^135136445 is an apocalyptic number.

It is an amenable number.

135136445 is a deficient number, since it is larger than the sum of its proper divisors (27027295).

135136445 is an equidigital number, since it uses as much as digits as its factorization.

135136445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27027294.

The product of its digits is 21600, while the sum is 32.

The square root of 135136445 is about 11624.8202136635. The cubic root of 135136445 is about 513.1655537120.

Adding to 135136445 its reverse (544631531), we get a palindrome (679767976).

The spelling of 135136445 in words is "one hundred thirty-five million, one hundred thirty-six thousand, four hundred forty-five".