10209641 has 4 divisors (see below), whose sum is σ = 10995012. Its totient is φ = 9424272.

The previous prime is 10209637. The next prime is 10209643. The reversal of 10209641 is 14690201.

It is a happy number.

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 6864400 + 3345241 = 2620^2 + 1829^2 .

It is not a de Polignac number, because 10209641 - 2² = 10209637 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 (10209643) 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 3 ways as a sum of consecutive naturals, for example, 392666 + ... + 392691.

It is an arithmetic number, because the mean of its divisors is an integer number (2748753).

Almost surely, 2^10209641 is an apocalyptic number.

It is an amenable number.

10209641 is a deficient number, since it is larger than the sum of its proper divisors (785371).

10209641 is an equidigital number, since it uses as much as digits as its factorization.

10209641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785370.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10209641 is about 3195.2528851407. The cubic root of 10209641 is about 216.9385953238.

Adding to 10209641 its reverse (14690201), we get a palindrome (24899842).

The spelling of 10209641 in words is "ten million, two hundred nine thousand, six hundred forty-one".