42740855 has 4 divisors (see below), whose sum is σ = 51289032. Its totient is φ = 34192680.

The previous prime is 42740851. The next prime is 42740879. The reversal of 42740855 is 55804724.

42740855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42740855 - 2² = 42740851 is a prime.

It is a super-2 number, since 2×42740855² = 3653561372262050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42740851) 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, 4274081 + ... + 4274090.

It is an arithmetic number, because the mean of its divisors is an integer number (12822258).

Almost surely, 2^42740855 is an apocalyptic number.

42740855 is a deficient number, since it is larger than the sum of its proper divisors (8548177).

42740855 is an equidigital number, since it uses as much as digits as its factorization.

42740855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8548176.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 42740855 is about 6537.6490422781. The cubic root of 42740855 is about 349.6345982433.

The spelling of 42740855 in words is "forty-two million, seven hundred forty thousand, eight hundred fifty-five".