16064021 has 4 divisors (see below), whose sum is σ = 16076544. Its totient is φ = 16051500.

The previous prime is 16064003. The next prime is 16064023. The reversal of 16064021 is 12046061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12046061 = 89 ⋅135349.

It is a cyclic number.

It is not a de Polignac number, because 16064021 - 2¹⁰ = 16062997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16063984 and 16064002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16064023) 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 3 ways as a sum of consecutive naturals, for example, 4085 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (4019136).

Almost surely, 2^16064021 is an apocalyptic number.

It is an amenable number.

16064021 is a deficient number, since it is larger than the sum of its proper divisors (12523).

16064021 is a wasteful number, since it uses less digits than its factorization.

16064021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 16064021 is about 4007.9946357250. The cubic root of 16064021 is about 252.3198518966.

The spelling of 16064021 in words is "sixteen million, sixty-four thousand, twenty-one".