125123047242 has 16 divisors (see below), whose sum is σ = 251219817792. Its totient is φ = 41545395200.

The previous prime is 125123047229. The next prime is 125123047249. The reversal of 125123047242 is 242740321521.

It is a happy number.

It is a super-2 number, since 2×125123047242² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125123047249) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 40570134 + ... + 40573217.

It is an arithmetic number, because the mean of its divisors is an integer number (15701238612).

Almost surely, 2^125123047242 is an apocalyptic number.

125123047242 is an abundant number, since it is smaller than the sum of its proper divisors (126096770550).

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

125123047242 is a wasteful number, since it uses less digits than its factorization.

125123047242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81143613.

The product of its (nonzero) digits is 26880, while the sum is 33.

Adding to 125123047242 its reverse (242740321521), we get a palindrome (367863368763).

The spelling of 125123047242 in words is "one hundred twenty-five billion, one hundred twenty-three million, forty-seven thousand, two hundred forty-two".