16442139 has 16 divisors (see below), whose sum is σ = 25219328. Its totient is φ = 9333792.

The previous prime is 16442131. The next prime is 16442141. The reversal of 16442139 is 93124461.

It is not a de Polignac number, because 16442139 - 2³ = 16442131 is a prime.

It is a super-3 number, since 3×16442139³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804 + ... + 5790.

It is an arithmetic number, because the mean of its divisors is an integer number (1576208).

Almost surely, 2^16442139 is an apocalyptic number.

16442139 is a deficient number, since it is larger than the sum of its proper divisors (8777189).

16442139 is a wasteful number, since it uses less digits than its factorization.

16442139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154.

The product of its digits is 5184, while the sum is 30.

The square root of 16442139 is about 4054.8907506861. The cubic root of 16442139 is about 254.2842365446.

The spelling of 16442139 in words is "sixteen million, four hundred forty-two thousand, one hundred thirty-nine".