42005063421 has 12 divisors (see below), whose sum is σ = 60677838780. Its totient is φ = 28001594880.

The previous prime is 42005063357. The next prime is 42005063423. The reversal of 42005063421 is 12436050024.

42005063421 is a `hidden beast` number, since 4 + 2 + 0 + 0 + 5 + 0 + 634 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19019168100 + 22985895321 = 137910^2 + 151611^2 .

It is not a de Polignac number, because 42005063421 - 2⁶ = 42005063357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005063423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9885 + ... + 290013.

It is an arithmetic number, because the mean of its divisors is an integer number (5056486565).

Almost surely, 2^42005063421 is an apocalyptic number.

It is an amenable number.

42005063421 is a deficient number, since it is larger than the sum of its proper divisors (18672775359).

42005063421 is a wasteful number, since it uses less digits than its factorization.

42005063421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296796 (or 296793 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 42005063421 in words is "forty-two billion, five million, sixty-three thousand, four hundred twenty-one".