125021746242 has 32 divisors (see below), whose sum is σ = 287406316800. Its totient is φ = 40236883344.

The previous prime is 125021746207. The next prime is 125021746243. The reversal of 125021746242 is 242647120521.

125021746242 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 21 + 7 + 4 + 624 + 2 = 666.

It is a super-2 number, since 2×125021746242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125021746197 and 125021746206.

It is not an unprimeable number, because it can be changed into a prime (125021746243) 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 15 ways as a sum of consecutive naturals, for example, 39915978 + ... + 39919109.

It is an arithmetic number, because the mean of its divisors is an integer number (8981447400).

Almost surely, 2^125021746242 is an apocalyptic number.

125021746242 is an abundant number, since it is smaller than the sum of its proper divisors (162384570558).

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

125021746242 is a wasteful number, since it uses less digits than its factorization.

125021746242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79835127 (or 79835121 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

Adding to 125021746242 its reverse (242647120521), we get a palindrome (367668866763).

The spelling of 125021746242 in words is "one hundred twenty-five billion, twenty-one million, seven hundred forty-six thousand, two hundred forty-two".