125253109 has 6 divisors (see below), whose sum is σ = 128235606. Its totient is φ = 122338440.

The previous prime is 125253091. The next prime is 125253131. The reversal of 125253109 is 901352521.

It can be written as a sum of positive squares in only one way, i.e., 111894084 + 13359025 = 10578^2 + 3655^2 .

It is not a de Polignac number, because 125253109 - 2⁵ = 125253077 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 (125253169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32022 + ... + 35719.

It is an arithmetic number, because the mean of its divisors is an integer number (21372601).

Almost surely, 2^125253109 is an apocalyptic number.

It is an amenable number.

125253109 is a deficient number, since it is larger than the sum of its proper divisors (2982497).

125253109 is an frugal number, since it uses more digits than its factorization.

125253109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67827 (or 67784 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 125253109 is about 11191.6535418141. The cubic root of 125253109 is about 500.3372511389.

The spelling of 125253109 in words is "one hundred twenty-five million, two hundred fifty-three thousand, one hundred nine".