42621646 has 8 divisors (see below), whose sum is σ = 65138904. Its totient is φ = 20908680.

The previous prime is 42621641. The next prime is 42621647. The reversal of 42621646 is 64612624.

42621646 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42621641) 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 3 ways as a sum of consecutive naturals, for example, 200940 + ... + 201151.

It is an arithmetic number, because the mean of its divisors is an integer number (8142363).

Almost surely, 2^42621646 is an apocalyptic number.

42621646 is a deficient number, since it is larger than the sum of its proper divisors (22517258).

42621646 is a wasteful number, since it uses less digits than its factorization.

42621646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402146.

The product of its digits is 13824, while the sum is 31.

The square root of 42621646 is about 6528.5255609517. The cubic root of 42621646 is about 349.3092389694.

The spelling of 42621646 in words is "forty-two million, six hundred twenty-one thousand, six hundred forty-six".