10001181 has 4 divisors (see below), whose sum is σ = 13334912. Its totient is φ = 6667452.

The previous prime is 10001119. The next prime is 10001203. The reversal of 10001181 is 18110001.

It is a happy number.

10001181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10001181 - 2⁷ = 10001053 is a prime.

It is a super-2 number, since 2×10001181² = 200047242789522, 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 (10001081) 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, 1666861 + ... + 1666866.

It is an arithmetic number, because the mean of its divisors is an integer number (3333728).

Almost surely, 2^10001181 is an apocalyptic number.

It is an amenable number.

10001181 is a deficient number, since it is larger than the sum of its proper divisors (3333731).

10001181 is an equidigital number, since it uses as much as digits as its factorization.

10001181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333730.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 10001181 is about 3162.4643871513. The cubic root of 10001181 is about 215.4519499606.

Adding to 10001181 its reverse (18110001), we get a palindrome (28111182).

It can be divided in two parts, 10001 and 181, that multiplied together give a palindrome (1810181).

The spelling of 10001181 in words is "ten million, one thousand, one hundred eighty-one".