10521165 has 16 divisors (see below), whose sum is σ = 16890048. Its totient is φ = 5592576.

The previous prime is 10521157. The next prime is 10521169. The reversal of 10521165 is 56112501.

It is not a de Polignac number, because 10521165 - 2³ = 10521157 is a prime.

It is a super-2 number, since 2×10521165² = 221389825914450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4302 + ... + 6288.

It is an arithmetic number, because the mean of its divisors is an integer number (1055628).

Almost surely, 2^10521165 is an apocalyptic number.

10521165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10521165 is a deficient number, since it is larger than the sum of its proper divisors (6368883).

10521165 is a wasteful number, since it uses less digits than its factorization.

10521165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 10521165 is about 3243.6345355172. The cubic root of 10521165 is about 219.1229892352.

Adding to 10521165 its reverse (56112501), we get a palindrome (66633666).

The spelling of 10521165 in words is "ten million, five hundred twenty-one thousand, one hundred sixty-five".