64010021 has 4 divisors (see below), whose sum is σ = 64345344. Its totient is φ = 63674700.

The previous prime is 64010017. The next prime is 64010027. The reversal of 64010021 is 12001046.

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 a cyclic number.

It is not a de Polignac number, because 64010021 - 2² = 64010017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64009978 and 64010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64010027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167375 + ... + 167756.

It is an arithmetic number, because the mean of its divisors is an integer number (16086336).

Almost surely, 2^64010021 is an apocalyptic number.

It is an amenable number.

64010021 is a deficient number, since it is larger than the sum of its proper divisors (335323).

64010021 is a wasteful number, since it uses less digits than its factorization.

64010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335322.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 64010021 is about 8000.6262879852. The cubic root of 64010021 is about 400.0208759938.

Adding to 64010021 its reverse (12001046), we get a palindrome (76011067).

The spelling of 64010021 in words is "sixty-four million, ten thousand, twenty-one".