10005521 has 8 divisors (see below), whose sum is σ = 10156800. Its totient is φ = 9855648.

The previous prime is 10005511. The next prime is 10005539. The reversal of 10005521 is 12550001.

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 10005521 - 2¹⁰ = 10004497 is a prime.

It is a super-2 number, since 2×10005521² = 200220900962882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10005496 and 10005505.

It is not an unprimeable number, because it can be changed into a prime (10005511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27080 + ... + 27446.

It is an arithmetic number, because the mean of its divisors is an integer number (1269600).

Almost surely, 2^10005521 is an apocalyptic number.

It is an amenable number.

10005521 is a deficient number, since it is larger than the sum of its proper divisors (151279).

10005521 is a wasteful number, since it uses less digits than its factorization.

10005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 10005521 is about 3163.1504864612. The cubic root of 10005521 is about 215.4831104885.

Adding to 10005521 its reverse (12550001), we get a palindrome (22555522).

The spelling of 10005521 in words is "ten million, five thousand, five hundred twenty-one".