42621583 has 2 divisors, whose sum is σ = 42621584. Its totient is φ = 42621582.

The previous prime is 42621569. The next prime is 42621589. The reversal of 42621583 is 38512624.

42621583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42621583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42621589) 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 as a sum of consecutive naturals, namely, 21310791 + 21310792.

It is an arithmetic number, because the mean of its divisors is an integer number (21310792).

Almost surely, 2^42621583 is an apocalyptic number.

42621583 is a deficient number, since it is larger than the sum of its proper divisors (1).

42621583 is an equidigital number, since it uses as much as digits as its factorization.

42621583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 42621583 is about 6528.5207359707. The cubic root of 42621583 is about 349.3090668621.

The spelling of 42621583 in words is "forty-two million, six hundred twenty-one thousand, five hundred eighty-three".