125973609 has 16 divisors (see below), whose sum is σ = 170651712. Its totient is φ = 82649088.

The previous prime is 125973569. The next prime is 125973613. The reversal of 125973609 is 906379521.

It is not a de Polignac number, because 125973609 - 2⁷ = 125973481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125973649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55042 + ... + 57284.

It is an arithmetic number, because the mean of its divisors is an integer number (10665732).

Almost surely, 2^125973609 is an apocalyptic number.

It is an amenable number.

125973609 is a deficient number, since it is larger than the sum of its proper divisors (44678103).

125973609 is a wasteful number, since it uses less digits than its factorization.

125973609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 125973609 is about 11223.7965501875. The cubic root of 125973609 is about 501.2947894795.

The spelling of 125973609 in words is "one hundred twenty-five million, nine hundred seventy-three thousand, six hundred nine".