4099745 has 8 divisors (see below), whose sum is σ = 5298216. Its totient is φ = 3027456.

The previous prime is 4099729. The next prime is 4099789. The reversal of 4099745 is 5479904.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 3876961 = 472^2 + 1969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4099745 - 2⁴ = 4099729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4099699 and 4099708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31472 + ... + 31601.

It is an arithmetic number, because the mean of its divisors is an integer number (662277).

Almost surely, 2^4099745 is an apocalyptic number.

It is an amenable number.

4099745 is a deficient number, since it is larger than the sum of its proper divisors (1198471).

4099745 is a wasteful number, since it uses less digits than its factorization.

4099745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63091.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 4099745 is about 2024.7827043908. The cubic root of 4099745 is about 160.0487481669.

The spelling of 4099745 in words is "four million, ninety-nine thousand, seven hundred forty-five".