42118655 has 4 divisors (see below), whose sum is σ = 50542392. Its totient is φ = 33694920.

The previous prime is 42118631. The next prime is 42118663. The reversal of 42118655 is 55681124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42118655 - 2¹⁸ = 41856511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4211861 + ... + 4211870.

It is an arithmetic number, because the mean of its divisors is an integer number (12635598).

Almost surely, 2^42118655 is an apocalyptic number.

42118655 is a deficient number, since it is larger than the sum of its proper divisors (8423737).

42118655 is an equidigital number, since it uses as much as digits as its factorization.

42118655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423736.

The product of its digits is 9600, while the sum is 32.

The square root of 42118655 is about 6489.8886739296. Note that the first 3 decimals coincide. The cubic root of 42118655 is about 347.9296963499.

Adding to 42118655 its reverse (55681124), we get a palindrome (97799779).

The spelling of 42118655 in words is "forty-two million, one hundred eighteen thousand, six hundred fifty-five".