125032609 has 4 divisors (see below), whose sum is σ = 134650516. Its totient is φ = 115414704.

The previous prime is 125032547. The next prime is 125032613. The reversal of 125032609 is 906230521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46621584 + 78411025 = 6828^2 + 8855^2 .

It is a cyclic number.

It is not a de Polignac number, because 125032609 - 2²³ = 116644001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125032619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4808934 + ... + 4808959.

It is an arithmetic number, because the mean of its divisors is an integer number (33662629).

Almost surely, 2^125032609 is an apocalyptic number.

It is an amenable number.

125032609 is a deficient number, since it is larger than the sum of its proper divisors (9617907).

125032609 is an equidigital number, since it uses as much as digits as its factorization.

125032609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9617906.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 125032609 is about 11181.7981112163. The cubic root of 125032609 is about 500.0434748864.

The spelling of 125032609 in words is "one hundred twenty-five million, thirty-two thousand, six hundred nine".