135124231252 has 12 divisors (see below), whose sum is σ = 240343919956. Its totient is φ = 66454539840.

The previous prime is 135124231243. The next prime is 135124231267. The reversal of 135124231252 is 252132421531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1756112836 + 133368118416 = 41906^2 + 365196^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276893673 + ... + 276894160.

Almost surely, 2^135124231252 is an apocalyptic number.

It is an amenable number.

135124231252 is a deficient number, since it is larger than the sum of its proper divisors (105219688704).

135124231252 is a wasteful number, since it uses less digits than its factorization.

135124231252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553787898 (or 553787896 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Adding to 135124231252 its reverse (252132421531), we get a palindrome (387256652783).

The spelling of 135124231252 in words is "one hundred thirty-five billion, one hundred twenty-four million, two hundred thirty-one thousand, two hundred fifty-two".