125150121 has 6 divisors (see below), whose sum is σ = 180772410. Its totient is φ = 83433408.

The previous prime is 125150117. The next prime is 125150147. The reversal of 125150121 is 121051521.

It can be written as a sum of positive squares in only one way, i.e., 120890025 + 4260096 = 10995^2 + 2064^2 .

It is not a de Polignac number, because 125150121 - 2² = 125150117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125150094 and 125150103.

It is not an unprimeable number, because it can be changed into a prime (125150191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6952776 + ... + 6952793.

It is an arithmetic number, because the mean of its divisors is an integer number (30128735).

Almost surely, 2^125150121 is an apocalyptic number.

It is an amenable number.

125150121 is a deficient number, since it is larger than the sum of its proper divisors (55622289).

125150121 is a wasteful number, since it uses less digits than its factorization.

125150121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13905575 (or 13905572 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 125150121 is about 11187.0514882162. The cubic root of 125150121 is about 500.2000812576.

The spelling of 125150121 in words is "one hundred twenty-five million, one hundred fifty thousand, one hundred twenty-one".