42522821 has 8 divisors (see below), whose sum is σ = 46440000. Its totient is φ = 38614240.

The previous prime is 42522811. The next prime is 42522833. The reversal of 42522821 is 12822524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42522821 - 2¹⁸ = 42260677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42522811) 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, 12680 + ... + 15678.

It is an arithmetic number, because the mean of its divisors is an integer number (5805000).

Almost surely, 2^42522821 is an apocalyptic number.

It is an amenable number.

42522821 is a deficient number, since it is larger than the sum of its proper divisors (3917179).

42522821 is a wasteful number, since it uses less digits than its factorization.

42522821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299.

The product of its digits is 2560, while the sum is 26.

The square root of 42522821 is about 6520.9524611057. The cubic root of 42522821 is about 349.0390538749.

The spelling of 42522821 in words is "forty-two million, five hundred twenty-two thousand, eight hundred twenty-one".