10000581 has 4 divisors (see below), whose sum is σ = 13334112. Its totient is φ = 6667052.

The previous prime is 10000537. The next prime is 10000583. The reversal of 10000581 is 18500001.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 10000581 - 2⁷ = 10000453 is a prime.

It is a super-2 number, since 2×10000581² = 200023240675122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10000581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000583) 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, 1666761 + ... + 1666766.

It is an arithmetic number, because the mean of its divisors is an integer number (3333528).

Almost surely, 2^10000581 is an apocalyptic number.

It is an amenable number.

10000581 is a deficient number, since it is larger than the sum of its proper divisors (3333531).

10000581 is an equidigital number, since it uses as much as digits as its factorization.

10000581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333530.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 10000581 is about 3162.3695230001. The cubic root of 10000581 is about 215.4476413442.

Adding to 10000581 its reverse (18500001), we get a palindrome (28500582).

The spelling of 10000581 in words is "ten million, five hundred eighty-one", and thus it is an aban number.