10000521 has 6 divisors (see below), whose sum is σ = 14445210. Its totient is φ = 6667008.

The previous prime is 10000511. The next prime is 10000537. The reversal of 10000521 is 12500001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9217296 + 783225 = 3036^2 + 885^2 .

It is not a de Polignac number, because 10000521 - 2⁶ = 10000457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1111169 = 10000521 / (1 + 0 + 0 + 0 + 0 + 5 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (10000511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555576 + ... + 555593.

It is an arithmetic number, because the mean of its divisors is an integer number (2407535).

Almost surely, 2^10000521 is an apocalyptic number.

It is an amenable number.

10000521 is a deficient number, since it is larger than the sum of its proper divisors (4444689).

10000521 is a wasteful number, since it uses less digits than its factorization.

10000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111175 (or 1111172 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 10000521 is about 3162.3600364285. The cubic root of 10000521 is about 215.4472104731.

Adding to 10000521 its reverse (12500001), we get a palindrome (22500522).

The spelling of 10000521 in words is "ten million, five hundred twenty-one", and thus it is an aban number.