16142081 has 4 divisors (see below), whose sum is σ = 16269312. Its totient is φ = 16014852.

The previous prime is 16142059. The next prime is 16142083. The reversal of 16142081 is 18024161.

16142081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 18024161 = 181 ⋅99581.

It is a cyclic number.

It is not a de Polignac number, because 16142081 - 2⁶ = 16142017 is a prime.

It is a super-2 number, since 2×16142081² = 521133558021122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16142083) 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, 63425 + ... + 63678.

It is an arithmetic number, because the mean of its divisors is an integer number (4067328).

Almost surely, 2^16142081 is an apocalyptic number.

It is an amenable number.

16142081 is a deficient number, since it is larger than the sum of its proper divisors (127231).

16142081 is a wasteful number, since it uses less digits than its factorization.

16142081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127230.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 16142081 is about 4017.7208713399. The cubic root of 16142081 is about 252.7278915022.

The spelling of 16142081 in words is "sixteen million, one hundred forty-two thousand, eighty-one".