10020865 has 8 divisors (see below), whose sum is σ = 12113640. Its totient is φ = 7957632.

The previous prime is 10020859. The next prime is 10020887. The reversal of 10020865 is 56802001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 361201 + 9659664 = 601^2 + 3108^2 .

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 10020865 - 2⁵ = 10020833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6630 + ... + 7999.

It is an arithmetic number, because the mean of its divisors is an integer number (1514205).

Almost surely, 2^10020865 is an apocalyptic number.

It is an amenable number.

10020865 is a deficient number, since it is larger than the sum of its proper divisors (2092775).

10020865 is a wasteful number, since it uses less digits than its factorization.

10020865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 10020865 is about 3165.5749872653. The cubic root of 10020865 is about 215.5932058421.

Adding to 10020865 its reverse (56802001), we get a palindrome (66822866).

The spelling of 10020865 in words is "ten million, twenty thousand, eight hundred sixty-five".