135123132 has 12 divisors (see below), whose sum is σ = 315287336. Its totient is φ = 45041040.

The previous prime is 135123119. The next prime is 135123133. The reversal of 135123132 is 231321531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 135123099 and 135123108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135123133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5630119 + ... + 5630142.

Almost surely, 2^135123132 is an apocalyptic number.

135123132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135123132 is an abundant number, since it is smaller than the sum of its proper divisors (180164204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135123132 is a wasteful number, since it uses less digits than its factorization.

135123132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11260268 (or 11260266 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 135123132 is about 11624.2475885539. The cubic root of 135123132 is about 513.1487016152.

Adding to 135123132 its reverse (231321531), we get a palindrome (366444663).

The spelling of 135123132 in words is "one hundred thirty-five million, one hundred twenty-three thousand, one hundred thirty-two".