42245445 has 16 divisors (see below), whose sum is σ = 73737792. Its totient is φ = 20482560.

The previous prime is 42245383. The next prime is 42245447. The reversal of 42245445 is 54454224.

It is not a de Polignac number, because 42245445 - 2⁷ = 42245317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42245447) 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, 127852 + ... + 128181.

It is an arithmetic number, because the mean of its divisors is an integer number (4608612).

Almost surely, 2^42245445 is an apocalyptic number.

It is an amenable number.

42245445 is a deficient number, since it is larger than the sum of its proper divisors (31492347).

42245445 is a wasteful number, since it uses less digits than its factorization.

42245445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256052.

The product of its digits is 25600, while the sum is 30.

The square root of 42245445 is about 6499.6496059403. The cubic root of 42245445 is about 348.2784714516.

Adding to 42245445 its reverse (54454224), we get a palindrome (96699669).

It can be divided in two parts, 4224 and 5445, that added together give a palindrome (9669).

The spelling of 42245445 in words is "forty-two million, two hundred forty-five thousand, four hundred forty-five".