4099145 has 4 divisors (see below), whose sum is σ = 4918980. Its totient is φ = 3279312.

The previous prime is 4099141. The next prime is 4099171. The reversal of 4099145 is 5419904.

4099145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1993744 + 2105401 = 1412^2 + 1451^2 .

It is a cyclic number.

It is not a de Polignac number, because 4099145 - 2² = 4099141 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 409910 + ... + 409919.

It is an arithmetic number, because the mean of its divisors is an integer number (1229745).

Almost surely, 2^4099145 is an apocalyptic number.

It is an amenable number.

4099145 is a deficient number, since it is larger than the sum of its proper divisors (819835).

4099145 is an equidigital number, since it uses as much as digits as its factorization.

4099145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819834.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 4099145 is about 2024.6345349223. The cubic root of 4099145 is about 160.0409400444.

The spelling of 4099145 in words is "four million, ninety-nine thousand, one hundred forty-five".