4005049 has 2 divisors, whose sum is σ = 4005050. Its totient is φ = 4005048.

The previous prime is 4005019. The next prime is 4005091. The reversal of 4005049 is 9405004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3396649 + 608400 = 1843^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005049 - 2¹¹ = 4003001 is a prime.

4005049 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4005019) 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, 2002524 + 2002525.

It is an arithmetic number, because the mean of its divisors is an integer number (2002525).

Almost surely, 2^4005049 is an apocalyptic number.

It is an amenable number.

4005049 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005049 is an equidigital number, since it uses as much as digits as its factorization.

4005049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4005049 is about 2001.2618519324. The cubic root of 4005049 is about 158.8068670139.

The spelling of 4005049 in words is "four million, five thousand, forty-nine".