42549853 has 2 divisors, whose sum is σ = 42549854. Its totient is φ = 42549852.

The previous prime is 42549847. The next prime is 42549877. The reversal of 42549853 is 35894524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42549529 + 324 = 6523^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 42549853 - 2⁵ = 42549821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42549823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21274926 + 21274927.

It is an arithmetic number, because the mean of its divisors is an integer number (21274927).

Almost surely, 2^42549853 is an apocalyptic number.

It is an amenable number.

42549853 is a deficient number, since it is larger than the sum of its proper divisors (1).

42549853 is an equidigital number, since it uses as much as digits as its factorization.

42549853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 42549853 is about 6523.0248351513. The cubic root of 42549853 is about 349.1130002473.

The spelling of 42549853 in words is "forty-two million, five hundred forty-nine thousand, eight hundred fifty-three".