125138 has 8 divisors (see below), whose sum is σ = 202188. Its totient is φ = 57744.

The previous prime is 125131. The next prime is 125141. The reversal of 125138 is 831521.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 529 = 353^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (125131) by changing a digit.

125138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2381 + ... + 2432.

2¹²⁵¹³⁸ is an apocalyptic number.

125138 is a deficient number, since it is larger than the sum of its proper divisors (77050).

125138 is a wasteful number, since it uses less digits than its factorization.

125138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828.

The product of its digits is 240, while the sum is 20.

The square root of 125138 is about 353.7484982300. The cubic root of 125138 is about 50.0183932329.

Adding to 125138 its reverse (831521), we get a palindrome (956659).

It can be divided in two parts, 12513 and 8, that added together give a palindrome (12521).

The spelling of 125138 in words is "one hundred twenty-five thousand, one hundred thirty-eight".