10020565 has 8 divisors (see below), whose sum is σ = 12732120. Its totient is φ = 7544832.

The previous prime is 10020559. The next prime is 10020613. The reversal of 10020565 is 56502001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1205604 + 8814961 = 1098^2 + 2969^2 .

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 10020565 - 2²³ = 1631957 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 58860 + ... + 59029.

It is an arithmetic number, because the mean of its divisors is an integer number (1591515).

Almost surely, 2^10020565 is an apocalyptic number.

It is an amenable number.

10020565 is a deficient number, since it is larger than the sum of its proper divisors (2711555).

10020565 is a wasteful number, since it uses less digits than its factorization.

10020565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117911.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 10020565 is about 3165.5276021542. The cubic root of 10020565 is about 215.5910543776.

Adding to 10020565 its reverse (56502001), we get a palindrome (66522566).

It can be divided in two parts, 10020 and 565, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 10020565 in words is "ten million, twenty thousand, five hundred sixty-five".