125506121 has 32 divisors (see below), whose sum is σ = 150087168. Its totient is φ = 103864320.

The previous prime is 125506103. The next prime is 125506123. The reversal of 125506121 is 121605521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125506121 - 2⁶ = 125506057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125506123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446501 + ... + 446781.

It is an arithmetic number, because the mean of its divisors is an integer number (4690224).

Almost surely, 2^125506121 is an apocalyptic number.

It is an amenable number.

125506121 is a deficient number, since it is larger than the sum of its proper divisors (24581047).

125506121 is a wasteful number, since it uses less digits than its factorization.

125506121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 125506121 is about 11202.9514414729. The cubic root of 125506121 is about 500.6739192576.

Subtracting from 125506121 its product of nonzero digits (600), we obtain a palindrome (125505521).

The spelling of 125506121 in words is "one hundred twenty-five million, five hundred six thousand, one hundred twenty-one".