135123417 has 64 divisors (see below), whose sum is σ = 238694400. Its totient is φ = 74468160.

The previous prime is 135123403. The next prime is 135123427. The reversal of 135123417 is 714321531.

It is not a de Polignac number, because 135123417 - 2¹⁴ = 135107033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (135123427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304798 + ... + 305240.

It is an arithmetic number, because the mean of its divisors is an integer number (3729600).

Almost surely, 2^135123417 is an apocalyptic number.

It is an amenable number.

135123417 is a deficient number, since it is larger than the sum of its proper divisors (103570983).

135123417 is a wasteful number, since it uses less digits than its factorization.

135123417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 135123417 is about 11624.2598474053. The cubic root of 135123417 is about 513.1490623905.

Adding to 135123417 its reverse (714321531), we get a palindrome (849444948).

The spelling of 135123417 in words is "one hundred thirty-five million, one hundred twenty-three thousand, four hundred seventeen".