16065381 has 8 divisors (see below), whose sum is σ = 21439584. Its totient is φ = 10700720.

The previous prime is 16065377. The next prime is 16065403. The reversal of 16065381 is 18356061.

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

It is a cyclic number.

It is not a de Polignac number, because 16065381 - 2² = 16065377 is a prime.

It is a super-4 number, since 4×16065381⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16064381) 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 7 ways as a sum of consecutive naturals, for example, 3955 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (2679948).

Almost surely, 2^16065381 is an apocalyptic number.

It is an amenable number.

16065381 is a deficient number, since it is larger than the sum of its proper divisors (5374203).

16065381 is a wasteful number, since it uses less digits than its factorization.

16065381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 16065381 is about 4008.1642930399. The cubic root of 16065381 is about 252.3269722665.

The spelling of 16065381 in words is "sixteen million, sixty-five thousand, three hundred eighty-one".