42006049 has 2 divisors, whose sum is σ = 42006050. Its totient is φ = 42006048.

The previous prime is 42006037. The next prime is 42006089. The reversal of 42006049 is 94060024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 19963024 = 4695^2 + 4468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42006049 is a prime.

It is not a weakly prime, because it can be changed into another prime (42006089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21003024 + 21003025.

It is an arithmetic number, because the mean of its divisors is an integer number (21003025).

Almost surely, 2^42006049 is an apocalyptic number.

It is an amenable number.

42006049 is a deficient number, since it is larger than the sum of its proper divisors (1).

42006049 is an equidigital number, since it uses as much as digits as its factorization.

42006049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 42006049 is about 6481.2073720874. The cubic root of 42006049 is about 347.6193513742.

The spelling of 42006049 in words is "forty-two million, six thousand, forty-nine".