42521504161 has 8 divisors (see below), whose sum is σ = 42944584320. Its totient is φ = 42099244992.

The previous prime is 42521504141. The next prime is 42521504183. The reversal of 42521504161 is 16140512524.

It is a happy number.

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 42521504161 - 2¹¹ = 42521502113 is a prime.

It is a super-2 number, since 2×42521504161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42521504131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100885 + ... + 308578.

It is an arithmetic number, because the mean of its divisors is an integer number (5368073040).

Almost surely, 2^42521504161 is an apocalyptic number.

It is an amenable number.

42521504161 is a deficient number, since it is larger than the sum of its proper divisors (423080159).

42521504161 is a wasteful number, since it uses less digits than its factorization.

42521504161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410495.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 42521504161 in words is "forty-two billion, five hundred twenty-one million, five hundred four thousand, one hundred sixty-one".