135423445 has 8 divisors (see below), whose sum is σ = 172067544. Its totient is φ = 101965824.

The previous prime is 135423439. The next prime is 135423461. The reversal of 135423445 is 544324531.

It can be written as a sum of positive squares in 4 ways, for example, as 18740241 + 116683204 = 4329^2 + 10802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135423445 - 2³ = 135423437 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 796524 + ... + 796693.

It is an arithmetic number, because the mean of its divisors is an integer number (21508443).

Almost surely, 2^135423445 is an apocalyptic number.

It is an amenable number.

135423445 is a deficient number, since it is larger than the sum of its proper divisors (36644099).

135423445 is a wasteful number, since it uses less digits than its factorization.

135423445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593239.

The product of its digits is 28800, while the sum is 31.

The square root of 135423445 is about 11637.1579434156. The cubic root of 135423445 is about 513.5285803167.

Adding to 135423445 its reverse (544324531), we get a palindrome (679747976).

The spelling of 135423445 in words is "one hundred thirty-five million, four hundred twenty-three thousand, four hundred forty-five".