64200021 has 8 divisors (see below), whose sum is σ = 85637664. Its totient is φ = 42781200.

The previous prime is 64200011. The next prime is 64200023. The reversal of 64200021 is 12000246.

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

It is not a de Polignac number, because 64200021 - 2¹⁰ = 64198997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64200023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8775 + ... + 14331.

It is an arithmetic number, because the mean of its divisors is an integer number (10704708).

Almost surely, 2^64200021 is an apocalyptic number.

It is an amenable number.

64200021 is a deficient number, since it is larger than the sum of its proper divisors (21437643).

64200021 is a wasteful number, since it uses less digits than its factorization.

64200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 64200021 is about 8012.4915600580. The cubic root of 64200021 is about 400.4162770499.

Adding to 64200021 its reverse (12000246), we get a palindrome (76200267).

The spelling of 64200021 in words is "sixty-four million, two hundred thousand, twenty-one".