125158123 has 4 divisors (see below), whose sum is σ = 125198208. Its totient is φ = 125118040.

The previous prime is 125158109. The next prime is 125158141. The reversal of 125158123 is 321851521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321851521 = 233 ⋅1381337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125158123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125158091 and 125158100.

It is not an unprimeable number, because it can be changed into a prime (125158183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14923 + ... + 21748.

It is an arithmetic number, because the mean of its divisors is an integer number (31299552).

Almost surely, 2^125158123 is an apocalyptic number.

125158123 is a deficient number, since it is larger than the sum of its proper divisors (40085).

125158123 is an equidigital number, since it uses as much as digits as its factorization.

125158123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40084.

The product of its digits is 2400, while the sum is 28.

The square root of 125158123 is about 11187.4091281226. The cubic root of 125158123 is about 500.2107418299.

The spelling of 125158123 in words is "one hundred twenty-five million, one hundred fifty-eight thousand, one hundred twenty-three".