125355609 has 12 divisors (see below), whose sum is σ = 181192752. Its totient is φ = 83513400.

The previous prime is 125355553. The next prime is 125355613. The reversal of 125355609 is 906553521.

125355609 is a `hidden beast` number, since 12 + 5 + 35 + 5 + 609 = 666.

It is not a de Polignac number, because 125355609 - 2¹⁶ = 125290073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125355679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12454 + ... + 20144.

It is an arithmetic number, because the mean of its divisors is an integer number (15099396).

Almost surely, 2^125355609 is an apocalyptic number.

It is an amenable number.

125355609 is a deficient number, since it is larger than the sum of its proper divisors (55837143).

125355609 is a wasteful number, since it uses less digits than its factorization.

125355609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508 (or 9505 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 125355609 is about 11196.2319107814. The cubic root of 125355609 is about 500.4736964150.

The spelling of 125355609 in words is "one hundred twenty-five million, three hundred fifty-five thousand, six hundred nine".