125121042 has 24 divisors (see below), whose sum is σ = 285364560. Its totient is φ = 39511800.

The previous prime is 125121019. The next prime is 125121067. The reversal of 125121042 is 240121521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182584 + ... + 183267.

It is an arithmetic number, because the mean of its divisors is an integer number (11890190).

Almost surely, 2^125121042 is an apocalyptic number.

125121042 is an abundant number, since it is smaller than the sum of its proper divisors (160243518).

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

125121042 is a wasteful number, since it uses less digits than its factorization.

125121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365878 (or 365875 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 125121042 is about 11185.7517404956. The cubic root of 125121042 is about 500.1613372683.

Adding to 125121042 its reverse (240121521), we get a palindrome (365242563).

The spelling of 125121042 in words is "one hundred twenty-five million, one hundred twenty-one thousand, forty-two".