10107521 has 4 divisors (see below), whose sum is σ = 10116612. Its totient is φ = 10098432.

The previous prime is 10107509. The next prime is 10107523. The reversal of 10107521 is 12570101.

10107521 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9991921 + 115600 = 3161^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10107521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10107521.

It is not an unprimeable number, because it can be changed into a prime (10107523) 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, 2600 + ... + 5193.

It is an arithmetic number, because the mean of its divisors is an integer number (2529153).

Almost surely, 2^10107521 is an apocalyptic number.

It is an amenable number.

10107521 is a deficient number, since it is larger than the sum of its proper divisors (9091).

10107521 is an equidigital number, since it uses as much as digits as its factorization.

10107521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 10107521 is about 3179.2327690812. The cubic root of 10107521 is about 216.2128745560.

Adding to 10107521 its reverse (12570101), we get a palindrome (22677622).

The spelling of 10107521 in words is "ten million, one hundred seven thousand, five hundred twenty-one".