10520861 has 4 divisors (see below), whose sum is σ = 11330172. Its totient is φ = 9711552.

The previous prime is 10520857. The next prime is 10520879. The reversal of 10520861 is 16802501.

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 3062500 + 7458361 = 1750^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 10520861 - 2² = 10520857 is a prime.

It is a super-2 number, since 2×10520861² = 221377032362642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10520761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404636 + ... + 404661.

It is an arithmetic number, because the mean of its divisors is an integer number (2832543).

Almost surely, 2^10520861 is an apocalyptic number.

It is an amenable number.

10520861 is a deficient number, since it is larger than the sum of its proper divisors (809311).

10520861 is an equidigital number, since it uses as much as digits as its factorization.

10520861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809310.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 10520861 is about 3243.5876741658. The cubic root of 10520861 is about 219.1208787582.

The spelling of 10520861 in words is "ten million, five hundred twenty thousand, eight hundred sixty-one".