42245865 has 24 divisors (see below), whose sum is σ = 73389888. Its totient is φ = 22480800.

The previous prime is 42245857. The next prime is 42245869. The reversal of 42245865 is 56854224.

It is a happy number.

42245865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42245865 - 2³ = 42245857 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42245869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28390 + ... + 29840.

It is an arithmetic number, because the mean of its divisors is an integer number (3057912).

Almost surely, 2^42245865 is an apocalyptic number.

42245865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42245865 is a deficient number, since it is larger than the sum of its proper divisors (31144023).

42245865 is a wasteful number, since it uses less digits than its factorization.

42245865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2106 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 42245865 is about 6499.6819152940. The cubic root of 42245865 is about 348.2796256310.

The spelling of 42245865 in words is "forty-two million, two hundred forty-five thousand, eight hundred sixty-five".