42272447 has 6 divisors (see below), whose sum is σ = 49174128. Its totient is φ = 36233484.

The previous prime is 42272443. The next prime is 42272449. The reversal of 42272447 is 74427224.

42272447 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 42272447 - 2² = 42272443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42272443) 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 5 ways as a sum of consecutive naturals, for example, 431303 + ... + 431400.

It is an arithmetic number, because the mean of its divisors is an integer number (8195688).

Almost surely, 2^42272447 is an apocalyptic number.

42272447 is a deficient number, since it is larger than the sum of its proper divisors (6901681).

42272447 is an equidigital number, since it uses as much as digits as its factorization.

42272447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862717 (or 862710 counting only the distinct ones).

The product of its digits is 25088, while the sum is 32.

The square root of 42272447 is about 6501.7264630250. The cubic root of 42272447 is about 348.3526586400.

The spelling of 42272447 in words is "forty-two million, two hundred seventy-two thousand, four hundred forty-seven".