42661443 has 16 divisors (see below), whose sum is σ = 63568512. Its totient is φ = 25224000.

The previous prime is 42661439. The next prime is 42661447. The reversal of 42661443 is 34416624.

42661443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42661439) and next prime (42661447).

It is not a de Polignac number, because 42661443 - 2² = 42661439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42661443.

It is not an unprimeable number, because it can be changed into a prime (42661447) 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, 14413 + ... + 17118.

It is an arithmetic number, because the mean of its divisors is an integer number (3973032).

Almost surely, 2^42661443 is an apocalyptic number.

42661443 is a deficient number, since it is larger than the sum of its proper divisors (20907069).

42661443 is a wasteful number, since it uses less digits than its factorization.

42661443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31586.

The product of its digits is 13824, while the sum is 30.

The square root of 42661443 is about 6531.5727814976. The cubic root of 42661443 is about 349.4179250214.

The spelling of 42661443 in words is "forty-two million, six hundred sixty-one thousand, four hundred forty-three".