42149805 has 8 divisors (see below), whose sum is σ = 67439712. Its totient is φ = 22479888.

The previous prime is 42149803. The next prime is 42149819. The reversal of 42149805 is 50894124.

42149805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42149805 - 2¹ = 42149803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42149803) 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 7 ways as a sum of consecutive naturals, for example, 1404979 + ... + 1405008.

It is an arithmetic number, because the mean of its divisors is an integer number (8429964).

Almost surely, 2^42149805 is an apocalyptic number.

It is an amenable number.

42149805 is a deficient number, since it is larger than the sum of its proper divisors (25289907).

42149805 is a wasteful number, since it uses less digits than its factorization.

42149805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809995.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 42149805 is about 6492.2881174514. The cubic root of 42149805 is about 348.0154488451.

The spelling of 42149805 in words is "forty-two million, one hundred forty-nine thousand, eight hundred five".