4099121 has 16 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 3581760.

The previous prime is 4099093. The next prime is 4099133. The reversal of 4099121 is 1219904.

4099121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4099121 - 2¹⁰ = 4098097 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31226 + ... + 31356.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

Almost surely, 2^4099121 is an apocalyptic number.

It is an amenable number.

4099121 is a deficient number, since it is larger than the sum of its proper divisors (557839).

4099121 is a wasteful number, since it uses less digits than its factorization.

4099121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4099121 is about 2024.6286079180. The cubic root of 4099121 is about 160.0406277036.

The spelling of 4099121 in words is "four million, ninety-nine thousand, one hundred twenty-one".