42040647 has 16 divisors (see below), whose sum is σ = 67944960. Its totient is φ = 25479000.

The previous prime is 42040637. The next prime is 42040667. The reversal of 42040647 is 74604024.

42040647 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 42040647 - 2⁴ = 42040631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 42040647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040637) 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, 70479 + ... + 71072.

It is an arithmetic number, because the mean of its divisors is an integer number (4246560).

Almost surely, 2^42040647 is an apocalyptic number.

42040647 is a deficient number, since it is larger than the sum of its proper divisors (25904313).

42040647 is a wasteful number, since it uses less digits than its factorization.

42040647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141571 (or 141565 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 42040647 is about 6483.8759241676. The cubic root of 42040647 is about 347.7147632982.

The spelling of 42040647 in words is "forty-two million, forty thousand, six hundred forty-seven".