125042121 has 12 divisors (see below), whose sum is σ = 181429248. Its totient is φ = 82986264.

The previous prime is 125042119. The next prime is 125042149. The reversal of 125042121 is 121240521.

It is not a de Polignac number, because 125042121 - 2¹ = 125042119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125042094 and 125042103.

It is not an unprimeable number, because it can be changed into a prime (125042921) 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 11 ways as a sum of consecutive naturals, for example, 29145 + ... + 33158.

It is an arithmetic number, because the mean of its divisors is an integer number (15119104).

Almost surely, 2^125042121 is an apocalyptic number.

It is an amenable number.

125042121 is a deficient number, since it is larger than the sum of its proper divisors (56387127).

125042121 is a wasteful number, since it uses less digits than its factorization.

125042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62532 (or 62529 counting only the distinct ones).

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

The square root of 125042121 is about 11182.2234372239. The cubic root of 125042121 is about 500.0561550263.

Adding to 125042121 its reverse (121240521), we get a palindrome (246282642).

The spelling of 125042121 in words is "one hundred twenty-five million, forty-two thousand, one hundred twenty-one".