10125809 has 8 divisors (see below), whose sum is σ = 10651392. Its totient is φ = 9612720.

The previous prime is 10125799. The next prime is 10125847. The reversal of 10125809 is 90852101.

It is a happy number.

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 10125809 - 2⁴ = 10125793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10125109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439 + ... + 4724.

It is an arithmetic number, because the mean of its divisors is an integer number (1331424).

Almost surely, 2^10125809 is an apocalyptic number.

It is an amenable number.

10125809 is a deficient number, since it is larger than the sum of its proper divisors (525583).

10125809 is an equidigital number, since it uses as much as digits as its factorization.

10125809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 10125809 is about 3182.1076348860. The cubic root of 10125809 is about 216.3431972687.

The spelling of 10125809 in words is "ten million, one hundred twenty-five thousand, eight hundred nine".