42825481 has 2 divisors, whose sum is σ = 42825482. Its totient is φ = 42825480.

The previous prime is 42825473. The next prime is 42825491. The reversal of 42825481 is 18452824.

42825481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 783225 = 6484^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 42825481 - 2³ = 42825473 is a prime.

It is a super-2 number, since 2×42825481² = 3668043645762722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42825451) 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, 21412740 + 21412741.

It is an arithmetic number, because the mean of its divisors is an integer number (21412741).

Almost surely, 2^42825481 is an apocalyptic number.

It is an amenable number.

42825481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42825481 is an equidigital number, since it uses as much as digits as its factorization.

42825481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20480, while the sum is 34.

The square root of 42825481 is about 6544.1180460013. The cubic root of 42825481 is about 349.8652025131.

The spelling of 42825481 in words is "forty-two million, eight hundred twenty-five thousand, four hundred eighty-one".