42125854 has 4 divisors (see below), whose sum is σ = 63188784. Its totient is φ = 21062926.

The previous prime is 42125851. The next prime is 42125861. The reversal of 42125854 is 45852124.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531462 + ... + 10531465.

It is an arithmetic number, because the mean of its divisors is an integer number (15797196).

Almost surely, 2^42125854 is an apocalyptic number.

42125854 is a deficient number, since it is larger than the sum of its proper divisors (21062930).

42125854 is a wasteful number, since it uses less digits than its factorization.

42125854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21062929.

The product of its digits is 12800, while the sum is 31.

The square root of 42125854 is about 6490.4432822420. The cubic root of 42125854 is about 347.9495181540.

Adding to 42125854 its reverse (45852124), we get a palindrome (87977978).

The spelling of 42125854 in words is "forty-two million, one hundred twenty-five thousand, eight hundred fifty-four".