102042019 has 2 divisors, whose sum is σ = 102042020. Its totient is φ = 102042018.

The previous prime is 102042011. The next prime is 102042037. The reversal of 102042019 is 910240201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102042019 - 2³ = 102042011 is a prime.

It is a super-2 number, since 2×102042019² = 20825147283192722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102041987 and 102042005.

It is not a weakly prime, because it can be changed into another prime (102042011) 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, 51021009 + 51021010.

It is an arithmetic number, because the mean of its divisors is an integer number (51021010).

Almost surely, 2^102042019 is an apocalyptic number.

102042019 is a deficient number, since it is larger than the sum of its proper divisors (1).

102042019 is an equidigital number, since it uses as much as digits as its factorization.

102042019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 102042019 is about 10101.5849746463. The cubic root of 102042019 is about 467.2970230408.

The spelling of 102042019 in words is "one hundred two million, forty-two thousand, nineteen".