123520013252 has 6 divisors (see below), whose sum is σ = 216160023198. Its totient is φ = 61760006624.

The previous prime is 123520013237. The next prime is 123520013293. The reversal of 123520013252 is 252310025321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62032876096 + 61487137156 = 249064^2 + 247966^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15440001653 + ... + 15440001660.

It is an arithmetic number, because the mean of its divisors is an integer number (36026670533).

Almost surely, 2^123520013252 is an apocalyptic number.

It is an amenable number.

123520013252 is a deficient number, since it is larger than the sum of its proper divisors (92640009946).

123520013252 is a wasteful number, since it uses less digits than its factorization.

123520013252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30880003317 (or 30880003315 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 123520013252 its reverse (252310025321), we get a palindrome (375830038573).

The spelling of 123520013252 in words is "one hundred twenty-three billion, five hundred twenty million, thirteen thousand, two hundred fifty-two".