16242139 has 2 divisors, whose sum is σ = 16242140. Its totient is φ = 16242138.

The previous prime is 16242137. The next prime is 16242167. The reversal of 16242139 is 93124261.

It is an a-pointer prime, because the next prime (16242167) can be obtained adding 16242139 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16242139 - 2¹ = 16242137 is a prime.

Together with 16242137, it forms a pair of twin primes.

It is equal to p_1045693 and since 16242139 and 1045693 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (16242133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8121069 + 8121070.

It is an arithmetic number, because the mean of its divisors is an integer number (8121070).

Almost surely, 2^16242139 is an apocalyptic number.

16242139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16242139 is an equidigital number, since it uses as much as digits as its factorization.

16242139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 16242139 is about 4030.1537191527. The cubic root of 16242139 is about 253.2490010540.

The spelling of 16242139 in words is "sixteen million, two hundred forty-two thousand, one hundred thirty-nine".