10209705 has 32 divisors (see below), whose sum is σ = 18247680. Its totient is φ = 4831680.

The previous prime is 10209643. The next prime is 10209709. The reversal of 10209705 is 50790201.

It is not a de Polignac number, because 10209705 - 2⁸ = 10209449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10209709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6376 + ... + 7814.

It is an arithmetic number, because the mean of its divisors is an integer number (570240).

Almost surely, 2^10209705 is an apocalyptic number.

10209705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10209705 is a deficient number, since it is larger than the sum of its proper divisors (8037975).

10209705 is a wasteful number, since it uses less digits than its factorization.

10209705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 10209705 is about 3195.2628999818. The cubic root of 10209705 is about 216.9390486222.

Adding to 10209705 its reverse (50790201), we get a palindrome (60999906).

The spelling of 10209705 in words is "ten million, two hundred nine thousand, seven hundred five".