840142027 has 2 divisors, whose sum is σ = 840142028. Its totient is φ = 840142026.

The previous prime is 840142003. The next prime is 840142087. The reversal of 840142027 is 720241048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840142027 - 2⁷ = 840141899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840141986 and 840142004.

It is not a weakly prime, because it can be changed into another prime (840142087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420071013 + 420071014.

It is an arithmetic number, because the mean of its divisors is an integer number (420071014).

Almost surely, 2^840142027 is an apocalyptic number.

840142027 is a deficient number, since it is larger than the sum of its proper divisors (1).

840142027 is an equidigital number, since it uses as much as digits as its factorization.

840142027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 840142027 is about 28985.2035873478. The cubic root of 840142027 is about 943.5919708382.

The spelling of 840142027 in words is "eight hundred forty million, one hundred forty-two thousand, twenty-seven".