105705521 has 8 divisors (see below), whose sum is σ = 108065760. Its totient is φ = 103364352.

The previous prime is 105705499. The next prime is 105705527. The reversal of 105705521 is 125507501.

It is a happy number.

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 105705521 - 2¹⁰ = 105704497 is a prime.

It is a super-2 number, since 2×105705521² = 22347314339762882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105705527) 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, 6746 + ... + 16028.

It is an arithmetic number, because the mean of its divisors is an integer number (13508220).

Almost surely, 2^105705521 is an apocalyptic number.

It is an amenable number.

105705521 is a deficient number, since it is larger than the sum of its proper divisors (2360239).

105705521 is an equidigital number, since it uses as much as digits as its factorization.

105705521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 105705521 is about 10281.3190301634. The cubic root of 105705521 is about 472.8236853414.

The spelling of 105705521 in words is "one hundred five million, seven hundred five thousand, five hundred twenty-one".