125073109 has 4 divisors (see below), whose sum is σ = 142940704. Its totient is φ = 107205516.

The previous prime is 125073107. The next prime is 125073187. The reversal of 125073109 is 901370521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901370521 = 131 ⋅6880691.

It is a cyclic number.

It is not a de Polignac number, because 125073109 - 2¹ = 125073107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125073101) 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, 8933787 + ... + 8933800.

It is an arithmetic number, because the mean of its divisors is an integer number (35735176).

Almost surely, 2^125073109 is an apocalyptic number.

It is an amenable number.

125073109 is a deficient number, since it is larger than the sum of its proper divisors (17867595).

125073109 is an equidigital number, since it uses as much as digits as its factorization.

125073109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867594.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 125073109 is about 11183.6089434493. The cubic root of 125073109 is about 500.0974596687.

The spelling of 125073109 in words is "one hundred twenty-five million, seventy-three thousand, one hundred nine".