64048021 has 4 divisors (see below), whose sum is σ = 64088332. Its totient is φ = 64007712.

The previous prime is 64048013. The next prime is 64048057. The reversal of 64048021 is 12084046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12006225 + 52041796 = 3465^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 64048021 - 2³ = 64048013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64048001) 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, 17670 + ... + 20983.

It is an arithmetic number, because the mean of its divisors is an integer number (16022083).

Almost surely, 2^64048021 is an apocalyptic number.

It is an amenable number.

64048021 is a deficient number, since it is larger than the sum of its proper divisors (40311).

64048021 is a wasteful number, since it uses less digits than its factorization.

64048021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40310.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 64048021 is about 8003.0007497188. Note that the first 3 decimals coincide. The cubic root of 64048021 is about 400.1000187385.

The spelling of 64048021 in words is "sixty-four million, forty-eight thousand, twenty-one".