42682521 has 16 divisors (see below), whose sum is σ = 65132928. Its totient is φ = 24355200.

The previous prime is 42682511. The next prime is 42682537. The reversal of 42682521 is 12528624.

It is not a de Polignac number, because 42682521 - 2¹³ = 42674329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42682511) 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 15 ways as a sum of consecutive naturals, for example, 23941 + ... + 25661.

It is an arithmetic number, because the mean of its divisors is an integer number (4070808).

Almost surely, 2^42682521 is an apocalyptic number.

It is an amenable number.

42682521 is a deficient number, since it is larger than the sum of its proper divisors (22450407).

42682521 is a wasteful number, since it uses less digits than its factorization.

42682521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912.

The product of its digits is 7680, while the sum is 30.

The square root of 42682521 is about 6533.1861292940. The cubic root of 42682521 is about 349.4754618968.

The spelling of 42682521 in words is "forty-two million, six hundred eighty-two thousand, five hundred twenty-one".