125726109 has 16 divisors (see below), whose sum is σ = 174451200. Its totient is φ = 80475696.

The previous prime is 125726099. The next prime is 125726129. The reversal of 125726109 is 901627521.

It is not a de Polignac number, because 125726109 - 2⁴ = 125726093 is a prime.

It is a super-3 number, since 3×125726109³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125726109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125726129) 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 15 ways as a sum of consecutive naturals, for example, 649 + ... + 15870.

It is an arithmetic number, because the mean of its divisors is an integer number (10903200).

Almost surely, 2^125726109 is an apocalyptic number.

It is an amenable number.

125726109 is a deficient number, since it is larger than the sum of its proper divisors (48725091).

125726109 is a wasteful number, since it uses less digits than its factorization.

125726109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16624.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 125726109 is about 11212.7654483629. The cubic root of 125726109 is about 500.9662767489.

It can be divided in two parts, 12572 and 6109, that added together give a palindrome (18681).

The spelling of 125726109 in words is "one hundred twenty-five million, seven hundred twenty-six thousand, one hundred nine".