125632009 has 8 divisors (see below), whose sum is σ = 132720480. Its totient is φ = 118591200.

The previous prime is 125632007. The next prime is 125632021. The reversal of 125632009 is 900236521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125632009 - 2¹ = 125632007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125632007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6427 + ... + 17104.

It is an arithmetic number, because the mean of its divisors is an integer number (16590060).

Almost surely, 2^125632009 is an apocalyptic number.

125632009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

125632009 is a deficient number, since it is larger than the sum of its proper divisors (7088471).

125632009 is a wasteful number, since it uses less digits than its factorization.

125632009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23831.

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

The square root of 125632009 is about 11208.5685526743. The cubic root of 125632009 is about 500.8412624279.

The spelling of 125632009 in words is "one hundred twenty-five million, six hundred thirty-two thousand, nine".