4095121 has 4 divisors (see below), whose sum is σ = 4195044. Its totient is φ = 3995200.

The previous prime is 4095109. The next prime is 4095139. The reversal of 4095121 is 1215904.

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 2433600 + 1661521 = 1560^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 4095121 - 2⁹ = 4094609 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4095092 and 4095101.

It is not an unprimeable number, because it can be changed into a prime (4098121) 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, 49900 + ... + 49981.

It is an arithmetic number, because the mean of its divisors is an integer number (1048761).

Almost surely, 2^4095121 is an apocalyptic number.

4095121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4095121 is a deficient number, since it is larger than the sum of its proper divisors (99923).

4095121 is an equidigital number, since it uses as much as digits as its factorization.

4095121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99922.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 4095121 is about 2023.6405313197. The cubic root of 4095121 is about 159.9885538687.

The spelling of 4095121 in words is "four million, ninety-five thousand, one hundred twenty-one".