102442019 has 2 divisors, whose sum is σ = 102442020. Its totient is φ = 102442018.

The previous prime is 102442013. The next prime is 102442033. The reversal of 102442019 is 910244201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102442019 is a prime.

It is a super-2 number, since 2×102442019² = 20988734513592722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102441985 and 102442003.

It is not a weakly prime, because it can be changed into another prime (102442013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51221009 + 51221010.

It is an arithmetic number, because the mean of its divisors is an integer number (51221010).

Almost surely, 2^102442019 is an apocalyptic number.

102442019 is a deficient number, since it is larger than the sum of its proper divisors (1).

102442019 is an equidigital number, since it uses as much as digits as its factorization.

102442019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102442019 is about 10121.3644831119. The cubic root of 102442019 is about 467.9068211868.

The spelling of 102442019 in words is "one hundred two million, four hundred forty-two thousand, nineteen".