4099645 has 16 divisors (see below), whose sum is σ = 5417280. Its totient is φ = 2953600.

The previous prime is 4099621. The next prime is 4099661. The reversal of 4099645 is 5469904.

It is not a de Polignac number, because 4099645 - 2⁷ = 4099517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6921 + ... + 7489.

It is an arithmetic number, because the mean of its divisors is an integer number (338580).

Almost surely, 2^4099645 is an apocalyptic number.

It is an amenable number.

4099645 is a deficient number, since it is larger than the sum of its proper divisors (1317635).

4099645 is a wasteful number, since it uses less digits than its factorization.

4099645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4099645 is about 2024.7580102323. The cubic root of 4099645 is about 160.0474468661.

It can be divided in two parts, 40996 and 45, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 4099645 in words is "four million, ninety-nine thousand, six hundred forty-five".