42506474 has 4 divisors (see below), whose sum is σ = 63759714. Its totient is φ = 21253236.

The previous prime is 42506473. The next prime is 42506479. The reversal of 42506474 is 47460524.

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

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 16933225 = 5057^2 + 4115^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42506474.

It is not an unprimeable number, because it can be changed into a prime (42506473) 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, 10626617 + ... + 10626620.

Almost surely, 2^42506474 is an apocalyptic number.

42506474 is a deficient number, since it is larger than the sum of its proper divisors (21253240).

42506474 is a wasteful number, since it uses less digits than its factorization.

42506474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21253239.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 42506474 is about 6519.6989194287. The cubic root of 42506474 is about 348.9943212460.

Adding to 42506474 its reverse (47460524), we get a palindrome (89966998).

The spelling of 42506474 in words is "forty-two million, five hundred six thousand, four hundred seventy-four".