135431345 has 24 divisors (see below), whose sum is σ = 189592488. Its totient is φ = 92601600.

The previous prime is 135431341. The next prime is 135431353. The reversal of 135431345 is 543134531.

It can be written as a sum of positive squares in 4 ways, for example, as 11242609 + 124188736 = 3353^2 + 11144^2 .

It is not a de Polignac number, because 135431345 - 2² = 135431341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135431341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127115 + ... + 128175.

It is an arithmetic number, because the mean of its divisors is an integer number (7899687).

Almost surely, 2^135431345 is an apocalyptic number.

It is an amenable number.

135431345 is a deficient number, since it is larger than the sum of its proper divisors (54161143).

135431345 is a wasteful number, since it uses less digits than its factorization.

135431345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1594 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 135431345 is about 11637.4973684208. The cubic root of 135431345 is about 513.5385657785.

Adding to 135431345 its reverse (543134531), we get a palindrome (678565876).

The spelling of 135431345 in words is "one hundred thirty-five million, four hundred thirty-one thousand, three hundred forty-five".