42929865 has 32 divisors (see below), whose sum is σ = 83260800. Its totient is φ = 20813760.

The previous prime is 42929851. The next prime is 42929869. The reversal of 42929865 is 56892924.

42929865 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 42929865 - 2⁹ = 42929353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 42929865.

It is not an unprimeable number, because it can be changed into a prime (42929869) 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 31 ways as a sum of consecutive naturals, for example, 12970 + ... + 15939.

It is an arithmetic number, because the mean of its divisors is an integer number (2601900).

Almost surely, 2^42929865 is an apocalyptic number.

42929865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42929865 is a deficient number, since it is larger than the sum of its proper divisors (40330935).

42929865 is a wasteful number, since it uses less digits than its factorization.

42929865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28934 (or 28928 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 42929865 is about 6552.0885983021. The cubic root of 42929865 is about 350.1492288815.

The spelling of 42929865 in words is "forty-two million, nine hundred twenty-nine thousand, eight hundred sixty-five".