42445065 has 16 divisors (see below), whose sum is σ = 73136448. Its totient is φ = 20895936.

The previous prime is 42445063. The next prime is 42445087. The reversal of 42445065 is 56054424.

It is not a de Polignac number, because 42445065 - 2¹ = 42445063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42445061) 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, 108639 + ... + 109028.

It is an arithmetic number, because the mean of its divisors is an integer number (4571028).

Almost surely, 2^42445065 is an apocalyptic number.

It is an amenable number.

42445065 is a deficient number, since it is larger than the sum of its proper divisors (30691383).

42445065 is a wasteful number, since it uses less digits than its factorization.

42445065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217688.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 42445065 is about 6514.9877206331. The cubic root of 42445065 is about 348.8261764971.

Adding to 42445065 its reverse (56054424), we get a palindrome (98499489).

The spelling of 42445065 in words is "forty-two million, four hundred forty-five thousand, sixty-five".