42120355 has 4 divisors (see below), whose sum is σ = 50544432. Its totient is φ = 33696280.

The previous prime is 42120301. The next prime is 42120367. The reversal of 42120355 is 55302124.

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

It is not a de Polignac number, because 42120355 - 2¹³ = 42112163 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4212031 + ... + 4212040.

It is an arithmetic number, because the mean of its divisors is an integer number (12636108).

Almost surely, 2^42120355 is an apocalyptic number.

42120355 is a deficient number, since it is larger than the sum of its proper divisors (8424077).

42120355 is an equidigital number, since it uses as much as digits as its factorization.

42120355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424076.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42120355 is about 6490.0196455789. The cubic root of 42120355 is about 347.9343773519.

Adding to 42120355 its reverse (55302124), we get a palindrome (97422479).

The spelling of 42120355 in words is "forty-two million, one hundred twenty thousand, three hundred fifty-five".