42424445 has 24 divisors (see below), whose sum is σ = 60613344. Its totient is φ = 28407456.

The previous prime is 42424429. The next prime is 42424451. The reversal of 42424445 is 54442424.

It is not a de Polignac number, because 42424445 - 2⁴ = 42424429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8522 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (2525556).

Almost surely, 2^42424445 is an apocalyptic number.

It is an amenable number.

42424445 is a deficient number, since it is larger than the sum of its proper divisors (18188899).

42424445 is a wasteful number, since it uses less digits than its factorization.

42424445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089 (or 4082 counting only the distinct ones).

The product of its digits is 20480, while the sum is 29.

The square root of 42424445 is about 6513.4050234881. The cubic root of 42424445 is about 348.7696802484.

Adding to 42424445 its reverse (54442424), we get a palindrome (96866869).

The spelling of 42424445 in words is "forty-two million, four hundred twenty-four thousand, four hundred forty-five".