124020115525 has 18 divisors (see below), whose sum is σ = 155209129782. Its totient is φ = 98305617600.

The previous prime is 124020115517. The next prime is 124020115591. The reversal of 124020115525 is 525511020421.

It can be written as a sum of positive squares in 9 ways, for example, as 173132964 + 123846982561 = 13158^2 + 351919^2 .

It is not a de Polignac number, because 124020115525 - 2³ = 124020115517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124020115493 and 124020115502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 88255 + ... + 505795.

Almost surely, 2^124020115525 is an apocalyptic number.

It is an amenable number.

124020115525 is a deficient number, since it is larger than the sum of its proper divisors (31189014257).

124020115525 is an equidigital number, since it uses as much as digits as its factorization.

124020115525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417769 (or 417655 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 124020115525 its reverse (525511020421), we get a palindrome (649531135946).

The spelling of 124020115525 in words is "one hundred twenty-four billion, twenty million, one hundred fifteen thousand, five hundred twenty-five".