10180861 has 4 divisors (see below), whose sum is σ = 10200924. Its totient is φ = 10160800.

The previous prime is 10180853. The next prime is 10180867. The reversal of 10180861 is 16808101.

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 2722500 + 7458361 = 1650^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 10180861 - 2³ = 10180853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10180867) 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, 9250 + ... + 10291.

It is an arithmetic number, because the mean of its divisors is an integer number (2550231).

Almost surely, 2^10180861 is an apocalyptic number.

It is an amenable number.

10180861 is a deficient number, since it is larger than the sum of its proper divisors (20063).

10180861 is an equidigital number, since it uses as much as digits as its factorization.

10180861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20062.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 10180861 is about 3190.7461509810. The cubic root of 10180861 is about 216.7345604454.

Adding to 10180861 its reverse (16808101), we get a palindrome (26988962).

The spelling of 10180861 in words is "ten million, one hundred eighty thousand, eight hundred sixty-one".