42017449 has 2 divisors, whose sum is σ = 42017450. Its totient is φ = 42017448.

The previous prime is 42017447. The next prime is 42017513. The reversal of 42017449 is 94471024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34727449 + 7290000 = 5893^2 + 2700^2 .

It is a cyclic number.

It is not a de Polignac number, because 42017449 - 2¹ = 42017447 is a prime.

Together with 42017447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42017449.

It is not a weakly prime, because it can be changed into another prime (42017447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21008724 + 21008725.

It is an arithmetic number, because the mean of its divisors is an integer number (21008725).

Almost surely, 2^42017449 is an apocalyptic number.

It is an amenable number.

42017449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42017449 is an equidigital number, since it uses as much as digits as its factorization.

42017449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 42017449 is about 6482.0867781911. The cubic root of 42017449 is about 347.6507952754.

The spelling of 42017449 in words is "forty-two million, seventeen thousand, four hundred forty-nine".