135420317 has 8 divisors (see below), whose sum is σ = 143725176. Its totient is φ = 127153152.

The previous prime is 135420269. The next prime is 135420319. The reversal of 135420317 is 713024531.

It can be written as a sum of positive squares in 4 ways, for example, as 37687321 + 97732996 = 6139^2 + 9886^2 .

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 135420317 - 2¹² = 135416221 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 (135420319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838 + ... + 16559.

It is an arithmetic number, because the mean of its divisors is an integer number (17965647).

Almost surely, 2^135420317 is an apocalyptic number.

135420317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135420317 is a deficient number, since it is larger than the sum of its proper divisors (8304859).

135420317 is a wasteful number, since it uses less digits than its factorization.

135420317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 135420317 is about 11637.0235455635. The cubic root of 135420317 is about 513.5246264721.

Adding to 135420317 its reverse (713024531), we get a palindrome (848444848).

The spelling of 135420317 in words is "one hundred thirty-five million, four hundred twenty thousand, three hundred seventeen".