10116521 has 4 divisors (see below), whose sum is σ = 10175172. Its totient is φ = 10057872.

The previous prime is 10116517. The next prime is 10116539. The reversal of 10116521 is 12561101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8526400 + 1590121 = 2920^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 10116521 - 2² = 10116517 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 10116521.

It is not an unprimeable number, because it can be changed into a prime (10116221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29066 + ... + 29411.

It is an arithmetic number, because the mean of its divisors is an integer number (2543793).

Almost surely, 2^10116521 is an apocalyptic number.

It is an amenable number.

10116521 is a deficient number, since it is larger than the sum of its proper divisors (58651).

10116521 is an equidigital number, since it uses as much as digits as its factorization.

10116521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58650.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 10116521 is about 3180.6478899746. The cubic root of 10116521 is about 216.2770293767.

Adding to 10116521 its reverse (12561101), we get a palindrome (22677622).

The spelling of 10116521 in words is "ten million, one hundred sixteen thousand, five hundred twenty-one".