42421443 has 24 divisors (see below), whose sum is σ = 60756528. Its totient is φ = 26320896.

The previous prime is 42421411. The next prime is 42421459. The reversal of 42421443 is 34412424.

It is a happy number.

It is not a de Polignac number, because 42421443 - 2⁵ = 42421411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42421493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97755 + ... + 98187.

It is an arithmetic number, because the mean of its divisors is an integer number (2531522).

Almost surely, 2^42421443 is an apocalyptic number.

42421443 is a deficient number, since it is larger than the sum of its proper divisors (18335085).

42421443 is a wasteful number, since it uses less digits than its factorization.

42421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 566 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 42421443 is about 6513.1745715895. The cubic root of 42421443 is about 348.7614536134.

Adding to 42421443 its reverse (34412424), we get a palindrome (76833867).

The spelling of 42421443 in words is "forty-two million, four hundred twenty-one thousand, four hundred forty-three".