135442517 has 6 divisors (see below), whose sum is σ = 157555638. Its totient is φ = 116093544.

The previous prime is 135442513. The next prime is 135442523. The reversal of 135442517 is 715244531.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 57896881 = 8806^2 + 7609^2 .

It is not a de Polignac number, because 135442517 - 2² = 135442513 is a prime.

It is a super-2 number, since 2×135442517² = 36689350822590578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135442513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1382018 + ... + 1382115.

It is an arithmetic number, because the mean of its divisors is an integer number (26259273).

Almost surely, 2^135442517 is an apocalyptic number.

It is an amenable number.

135442517 is a deficient number, since it is larger than the sum of its proper divisors (22113121).

135442517 is an equidigital number, since it uses as much as digits as its factorization.

135442517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764147 (or 2764140 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 135442517 is about 11637.9773586307. The cubic root of 135442517 is about 513.5526863282.

It can be divided in two parts, 13544 and 2517, that added together give a palindrome (16061).

The spelling of 135442517 in words is "one hundred thirty-five million, four hundred forty-two thousand, five hundred seventeen".