125531503124 has 24 divisors (see below), whose sum is σ = 220046275680. Its totient is φ = 62661194784.

The previous prime is 125531503117. The next prime is 125531503129. The reversal of 125531503124 is 421305135521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125531503129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15760367 + ... + 15768329.

It is an arithmetic number, because the mean of its divisors is an integer number (9168594820).

Almost surely, 2^125531503124 is an apocalyptic number.

It is an amenable number.

125531503124 is a deficient number, since it is larger than the sum of its proper divisors (94514772556).

125531503124 is a wasteful number, since it uses less digits than its factorization.

125531503124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14039 (or 14037 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 125531503124 its reverse (421305135521), we get a palindrome (546836638645).

The spelling of 125531503124 in words is "one hundred twenty-five billion, five hundred thirty-one million, five hundred three thousand, one hundred twenty-four".