42644147 has 16 divisors (see below), whose sum is σ = 52722432. Its totient is φ = 33588000.

The previous prime is 42644137. The next prime is 42644153. The reversal of 42644147 is 74144624.

42644147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42644147 - 2¹² = 42640051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42644137) 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 15 ways as a sum of consecutive naturals, for example, 21908 + ... + 23774.

It is an arithmetic number, because the mean of its divisors is an integer number (3295152).

Almost surely, 2^42644147 is an apocalyptic number.

42644147 is a deficient number, since it is larger than the sum of its proper divisors (10078285).

42644147 is a wasteful number, since it uses less digits than its factorization.

42644147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

The product of its digits is 21504, while the sum is 32.

The square root of 42644147 is about 6530.2486170130. The cubic root of 42644147 is about 349.3706977601.

The spelling of 42644147 in words is "forty-two million, six hundred forty-four thousand, one hundred forty-seven".