135205426 has 4 divisors (see below), whose sum is σ = 202808142. Its totient is φ = 67602712.

The previous prime is 135205393. The next prime is 135205429. The reversal of 135205426 is 624502531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624502531 = 17 ⋅36735443.

It can be written as a sum of positive squares in only one way, i.e., 133518025 + 1687401 = 11555^2 + 1299^2 .

It is a junction number, because it is equal to n+sod(n) for n = 135205394 and 135205403.

It is not an unprimeable number, because it can be changed into a prime (135205429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33801355 + ... + 33801358.

Almost surely, 2^135205426 is an apocalyptic number.

135205426 is a deficient number, since it is larger than the sum of its proper divisors (67602716).

135205426 is an equidigital number, since it uses as much as digits as its factorization.

135205426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67602715.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 135205426 is about 11627.7868057511. The cubic root of 135205426 is about 513.2528547398.

Adding to 135205426 its reverse (624502531), we get a palindrome (759707957).

The spelling of 135205426 in words is "one hundred thirty-five million, two hundred five thousand, four hundred twenty-six".