42621555 has 8 divisors (see below), whose sum is σ = 68194512. Its totient is φ = 22731488.

The previous prime is 42621547. The next prime is 42621569. The reversal of 42621555 is 55512624.

42621555 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 cyclic number.

It is not a de Polignac number, because 42621555 - 2³ = 42621547 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1420704 + ... + 1420733.

It is an arithmetic number, because the mean of its divisors is an integer number (8524314).

Almost surely, 2^42621555 is an apocalyptic number.

42621555 is a deficient number, since it is larger than the sum of its proper divisors (25572957).

42621555 is a wasteful number, since it uses less digits than its factorization.

42621555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841445.

The product of its digits is 12000, while the sum is 30.

The square root of 42621555 is about 6528.5185915336. The cubic root of 42621555 is about 349.3089903699.

The spelling of 42621555 in words is "forty-two million, six hundred twenty-one thousand, five hundred fifty-five".