42797155 has 4 divisors (see below), whose sum is σ = 51356592. Its totient is φ = 34237720.

The previous prime is 42797149. The next prime is 42797159. The reversal of 42797155 is 55179724.

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

It is not a de Polignac number, because 42797155 - 2³ = 42797147 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42797159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4279711 + ... + 4279720.

It is an arithmetic number, because the mean of its divisors is an integer number (12839148).

Almost surely, 2^42797155 is an apocalyptic number.

42797155 is a deficient number, since it is larger than the sum of its proper divisors (8559437).

42797155 is an equidigital number, since it uses as much as digits as its factorization.

42797155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559436.

The product of its digits is 88200, while the sum is 40.

The square root of 42797155 is about 6541.9534544355. The cubic root of 42797155 is about 349.7880485440.

The spelling of 42797155 in words is "forty-two million, seven hundred ninety-seven thousand, one hundred fifty-five".