10002081 has 8 divisors (see below), whose sum is σ = 13497120. Its totient is φ = 6587552.

The previous prime is 10002077. The next prime is 10002121. The reversal of 10002081 is 18020001.

It is a happy number.

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 10002081 - 2² = 10002077 is a prime.

It is a super-2 number, since 2×10002081² = 200083248661122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10002061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19836 + ... + 20333.

It is an arithmetic number, because the mean of its divisors is an integer number (1687140).

Almost surely, 2^10002081 is an apocalyptic number.

It is an amenable number.

10002081 is a deficient number, since it is larger than the sum of its proper divisors (3495039).

10002081 is an equidigital number, since it uses as much as digits as its factorization.

10002081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40255.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 10002081 is about 3162.6066780427. The cubic root of 10002081 is about 215.4584125620.

Adding to 10002081 its reverse (18020001), we get a palindrome (28022082).

It can be divided in two parts, 1000 and 2081, that added together give a triangular number (3081 = T₇₈).

The spelling of 10002081 in words is "ten million, two thousand, eighty-one".