42247481 has 16 divisors (see below), whose sum is σ = 45342720. Its totient is φ = 39275280.

The previous prime is 42247463. The next prime is 42247487. The reversal of 42247481 is 18474224.

It is a cyclic number.

It is not a de Polignac number, because 42247481 - 2¹⁸ = 41985337 is a prime.

It is a super-2 number, since 2×42247481² = 3569699301690722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42247487) 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 in 15 ways as a sum of consecutive naturals, for example, 221096 + ... + 221286.

It is an arithmetic number, because the mean of its divisors is an integer number (2833920).

Almost surely, 2^42247481 is an apocalyptic number.

It is an amenable number.

42247481 is a deficient number, since it is larger than the sum of its proper divisors (3095239).

42247481 is a wasteful number, since it uses less digits than its factorization.

42247481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 14336, while the sum is 32.

The square root of 42247481 is about 6499.8062278810. The cubic root of 42247481 is about 348.2840664025.

The spelling of 42247481 in words is "forty-two million, two hundred forty-seven thousand, four hundred eighty-one".