42506529 has 16 divisors (see below), whose sum is σ = 61152000. Its totient is φ = 26107776.

The previous prime is 42506501. The next prime is 42506531. The reversal of 42506529 is 92560524.

It is not a de Polignac number, because 42506529 - 2¹¹ = 42504481 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42506529.

It is not an unprimeable number, because it can be changed into a prime (42506539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39997 + ... + 41045.

It is an arithmetic number, because the mean of its divisors is an integer number (3822000).

Almost surely, 2^42506529 is an apocalyptic number.

It is an amenable number.

42506529 is a deficient number, since it is larger than the sum of its proper divisors (18645471).

42506529 is a wasteful number, since it uses less digits than its factorization.

42506529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 42506529 is about 6519.7031374135. The cubic root of 42506529 is about 348.9944717695.

The spelling of 42506529 in words is "forty-two million, five hundred six thousand, five hundred twenty-nine".