4105521 has 12 divisors (see below), whose sum is σ = 6777472. Its totient is φ = 2345976.

The previous prime is 4105499. The next prime is 4105531. The reversal of 4105521 is 1255014.

It is not a de Polignac number, because 4105521 - 2⁶ = 4105457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4105494 and 4105503.

It is not an unprimeable number, because it can be changed into a prime (4105531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32521 + ... + 32646.

Almost surely, 2^4105521 is an apocalyptic number.

It is an amenable number.

4105521 is a deficient number, since it is larger than the sum of its proper divisors (2671951).

4105521 is a wasteful number, since it uses less digits than its factorization.

4105521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65180 (or 65177 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 4105521 is about 2026.2085282616. The cubic root of 4105521 is about 160.1238754224.

The spelling of 4105521 in words is "four million, one hundred five thousand, five hundred twenty-one".