42045655 has 8 divisors (see below), whose sum is σ = 50494752. Its totient is φ = 33609888.

The previous prime is 42045637. The next prime is 42045659. The reversal of 42045655 is 55654024.

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 42045655 - 2¹⁷ = 41914583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42045659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5982 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (6311844).

Almost surely, 2^42045655 is an apocalyptic number.

42045655 is a deficient number, since it is larger than the sum of its proper divisors (8449097).

42045655 is a wasteful number, since it uses less digits than its factorization.

42045655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 42045655 is about 6484.2621014268. The cubic root of 42045655 is about 347.7285696699.

Adding to 42045655 its reverse (55654024), we get a palindrome (97699679).

The spelling of 42045655 in words is "forty-two million, forty-five thousand, six hundred fifty-five".