10509665 has 8 divisors (see below), whose sum is σ = 12952680. Its totient is φ = 8180352.

The previous prime is 10509661. The next prime is 10509677. The reversal of 10509665 is 56690501.

It can be written as a sum of positive squares in 4 ways, for example, as 327184 + 10182481 = 572^2 + 3191^2 .

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 10509665 - 2² = 10509661 is a prime.

It is a super-2 number, since 2×10509665² = 220906116824450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10509661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28220 + ... + 28589.

It is an arithmetic number, because the mean of its divisors is an integer number (1619085).

Almost surely, 2^10509665 is an apocalyptic number.

It is an amenable number.

10509665 is a deficient number, since it is larger than the sum of its proper divisors (2443015).

10509665 is an equidigital number, since it uses as much as digits as its factorization.

10509665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56851.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 10509665 is about 3241.8613480530. The cubic root of 10509665 is about 219.0431237750.

The spelling of 10509665 in words is "ten million, five hundred nine thousand, six hundred sixty-five".