42800449 has 2 divisors, whose sum is σ = 42800450. Its totient is φ = 42800448.

The previous prime is 42800413. The next prime is 42800473. The reversal of 42800449 is 94400824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33558849 + 9241600 = 5793^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 42800449 - 2⁹ = 42799937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42800449.

It is not a weakly prime, because it can be changed into another prime (42800479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21400224 + 21400225.

It is an arithmetic number, because the mean of its divisors is an integer number (21400225).

Almost surely, 2^42800449 is an apocalyptic number.

It is an amenable number.

42800449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42800449 is an equidigital number, since it uses as much as digits as its factorization.

42800449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 42800449 is about 6542.2052092548. The cubic root of 42800449 is about 349.7970224448.

The spelling of 42800449 in words is "forty-two million, eight hundred thousand, four hundred forty-nine".