4045849 has 2 divisors, whose sum is σ = 4045850. Its totient is φ = 4045848.

The previous prime is 4045843. The next prime is 4045883. The reversal of 4045849 is 9485404.

It is an a-pointer prime, because the next prime (4045883) can be obtained adding 4045849 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3583449 + 462400 = 1893^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045849 - 2⁵ = 4045817 is a prime.

It is not a weakly prime, because it can be changed into another prime (4045843) 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 as a sum of consecutive naturals, namely, 2022924 + 2022925.

It is an arithmetic number, because the mean of its divisors is an integer number (2022925).

Almost surely, 2^4045849 is an apocalyptic number.

It is an amenable number.

4045849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4045849 is an equidigital number, since it uses as much as digits as its factorization.

4045849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 4045849 is about 2011.4295911118. The cubic root of 4045849 is about 159.3443087896.

The spelling of 4045849 in words is "four million, forty-five thousand, eight hundred forty-nine".