135212423 has 8 divisors (see below), whose sum is σ = 141600096. Its totient is φ = 128867200.

The previous prime is 135212411. The next prime is 135212431. The reversal of 135212423 is 324212531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135212423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135212443) 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 7 ways as a sum of consecutive naturals, for example, 3998 + ... + 16923.

It is an arithmetic number, because the mean of its divisors is an integer number (17700012).

Almost surely, 2^135212423 is an apocalyptic number.

135212423 is a deficient number, since it is larger than the sum of its proper divisors (6387673).

135212423 is a wasteful number, since it uses less digits than its factorization.

135212423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21225.

The product of its digits is 1440, while the sum is 23.

The square root of 135212423 is about 11628.0876759680. The cubic root of 135212423 is about 513.2617083497.

Adding to 135212423 its reverse (324212531), we get a palindrome (459424954).

The spelling of 135212423 in words is "one hundred thirty-five million, two hundred twelve thousand, four hundred twenty-three".