64041021 has 12 divisors (see below), whose sum is σ = 100913280. Its totient is φ = 38812680.

The previous prime is 64041017. The next prime is 64041037. The reversal of 64041021 is 12014046.

64041021 is a `hidden beast` number, since 640 + 4 + 1 + 0 + 21 = 666.

64041021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64041021 - 2² = 64041017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64040985 and 64041003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64041421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323341 + ... + 323538.

It is an arithmetic number, because the mean of its divisors is an integer number (8409440).

Almost surely, 2^64041021 is an apocalyptic number.

It is an amenable number.

64041021 is a deficient number, since it is larger than the sum of its proper divisors (36872259).

64041021 is a wasteful number, since it uses less digits than its factorization.

64041021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646896 (or 646893 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 64041021 is about 8002.5634018107. The cubic root of 64041021 is about 400.0854421645.

Adding to 64041021 its reverse (12014046), we get a palindrome (76055067).

The spelling of 64041021 in words is "sixty-four million, forty-one thousand, twenty-one".