42281523 has 6 divisors (see below), whose sum is σ = 61073324. Its totient is φ = 28187676.

The previous prime is 42281509. The next prime is 42281539. The reversal of 42281523 is 32518224.

It is not a de Polignac number, because 42281523 - 2⁹ = 42281011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42281543) 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 in 5 ways as a sum of consecutive naturals, for example, 2348965 + ... + 2348982.

Almost surely, 2^42281523 is an apocalyptic number.

42281523 is a deficient number, since it is larger than the sum of its proper divisors (18791801).

42281523 is a wasteful number, since it uses less digits than its factorization.

42281523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697953 (or 4697950 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 42281523 is about 6502.4243940241. The cubic root of 42281523 is about 348.3775875848.

Adding to 42281523 its reverse (32518224), we get a palindrome (74799747).

The spelling of 42281523 in words is "forty-two million, two hundred eighty-one thousand, five hundred twenty-three".