125138089 has 4 divisors (see below), whose sum is σ = 125341524. Its totient is φ = 124934656.

The previous prime is 125138087. The next prime is 125138113. The reversal of 125138089 is 980831521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980831521 = 2381 ⋅411941.

It can be written as a sum of positive squares in 2 ways, for example, as 20178064 + 104960025 = 4492^2 + 10245^2 .

It is a cyclic number.

It is not a de Polignac number, because 125138089 - 2¹ = 125138087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125138087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100792 + ... + 102025.

It is an arithmetic number, because the mean of its divisors is an integer number (31335381).

Almost surely, 2^125138089 is an apocalyptic number.

It is an amenable number.

125138089 is a deficient number, since it is larger than the sum of its proper divisors (203435).

125138089 is an equidigital number, since it uses as much as digits as its factorization.

125138089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203434.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 125138089 is about 11186.5137107143. The cubic root of 125138089 is about 500.1840509089.

It can be divided in two parts, 12513 and 8089, that added together give a palindrome (20602).

The spelling of 125138089 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, eighty-nine".