42125855 has 4 divisors (see below), whose sum is σ = 50551032. Its totient is φ = 33700680.

The previous prime is 42125851. The next prime is 42125861. The reversal of 42125855 is 55852124.

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

It is not a de Polignac number, because 42125855 - 2² = 42125851 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 (42125851) 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, 4212581 + ... + 4212590.

It is an arithmetic number, because the mean of its divisors is an integer number (12637758).

Almost surely, 2^42125855 is an apocalyptic number.

42125855 is a deficient number, since it is larger than the sum of its proper divisors (8425177).

42125855 is an equidigital number, since it uses as much as digits as its factorization.

42125855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425176.

The product of its digits is 16000, while the sum is 32.

The square root of 42125855 is about 6490.4433592783. The cubic root of 42125855 is about 347.9495209073.

Adding to 42125855 its reverse (55852124), we get a palindrome (97977979).

The spelling of 42125855 in words is "forty-two million, one hundred twenty-five thousand, eight hundred fifty-five".