42509526 has 16 divisors (see below), whose sum is σ = 86828544. Its totient is φ = 13868264.

The previous prime is 42509521. The next prime is 42509527. The reversal of 42509526 is 62590524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42509521) 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 7 ways as a sum of consecutive naturals, for example, 75090 + ... + 75653.

It is an arithmetic number, because the mean of its divisors is an integer number (5426784).

Almost surely, 2^42509526 is an apocalyptic number.

42509526 is an abundant number, since it is smaller than the sum of its proper divisors (44319018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42509526 is a wasteful number, since it uses less digits than its factorization.

42509526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150795.

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

The square root of 42509526 is about 6519.9329751156. The cubic root of 42509526 is about 349.0026737397.

The spelling of 42509526 in words is "forty-two million, five hundred nine thousand, five hundred twenty-six".