42421444 has 24 divisors (see below), whose sum is σ = 80212608. Its totient is φ = 19514400.

The previous prime is 42421411. The next prime is 42421459. The reversal of 42421444 is 44412424.

It is a super-2 number, since 2×42421444² = 3599157822090272, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16869 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (3342192).

Almost surely, 2^42421444 is an apocalyptic number.

It is an amenable number.

42421444 is a deficient number, since it is larger than the sum of its proper divisors (37791164).

42421444 is a wasteful number, since it uses less digits than its factorization.

42421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715 (or 2713 counting only the distinct ones).

The product of its digits is 4096, while the sum is 25.

The square root of 42421444 is about 6513.1746483570. The cubic root of 42421444 is about 348.7614563538.

Adding to 42421444 its reverse (44412424), we get a palindrome (86833868).

The spelling of 42421444 in words is "forty-two million, four hundred twenty-one thousand, four hundred forty-four".