42427845 has 18 divisors (see below), whose sum is σ = 73617414. Its totient is φ = 22604880.

The previous prime is 42427843. The next prime is 42427849. The reversal of 42427845 is 54872424.

42427845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33942276 + 8485569 = 5826^2 + 2913^2 .

It is not a de Polignac number, because 42427845 - 2¹ = 42427843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42427843) 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 in 17 ways as a sum of consecutive naturals, for example, 43210 + ... + 44180.

Almost surely, 2^42427845 is an apocalyptic number.

42427845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42427845 is a deficient number, since it is larger than the sum of its proper divisors (31189569).

42427845 is an frugal number, since it uses more digits than its factorization.

42427845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 979 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 42427845 is about 6513.6660184569. Note that the first 3 decimals coincide. The cubic root of 42427845 is about 348.7789970879.

The spelling of 42427845 in words is "forty-two million, four hundred twenty-seven thousand, eight hundred forty-five".