64062021 has 4 divisors (see below), whose sum is σ = 85416032. Its totient is φ = 42708012.

The previous prime is 64062007. The next prime is 64062029. The reversal of 64062021 is 12026046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64062021 - 2⁵ = 64061989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64062029) 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 3 ways as a sum of consecutive naturals, for example, 10677001 + ... + 10677006.

It is an arithmetic number, because the mean of its divisors is an integer number (21354008).

Almost surely, 2^64062021 is an apocalyptic number.

It is an amenable number.

64062021 is a deficient number, since it is larger than the sum of its proper divisors (21354011).

64062021 is a wasteful number, since it uses less digits than its factorization.

64062021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21354010.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 64062021 is about 8003.8753738423. The cubic root of 64062021 is about 400.1291687008.

Adding to 64062021 its reverse (12026046), we get a palindrome (76088067).

The spelling of 64062021 in words is "sixty-four million, sixty-two thousand, twenty-one".