42423481 has 2 divisors, whose sum is σ = 42423482. Its totient is φ = 42423480.

The previous prime is 42423473. The next prime is 42423503. The reversal of 42423481 is 18432424.

It is a happy number.

42423481 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., 26101881 + 16321600 = 5109^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423481 - 2³ = 42423473 is a prime.

It is a super-2 number, since 2×42423481² = 3599503480314722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42423401) 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, 21211740 + 21211741.

It is an arithmetic number, because the mean of its divisors is an integer number (21211741).

Almost surely, 2^42423481 is an apocalyptic number.

It is an amenable number.

42423481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423481 is an equidigital number, since it uses as much as digits as its factorization.

42423481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 28.

The square root of 42423481 is about 6513.3310218351. The cubic root of 42423481 is about 348.7670385598.

The spelling of 42423481 in words is "forty-two million, four hundred twenty-three thousand, four hundred eighty-one".