210642071 has 2 divisors, whose sum is σ = 210642072. Its totient is φ = 210642070.

The previous prime is 210642059. The next prime is 210642077. The reversal of 210642071 is 170246012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210642071 - 2⁶ = 210642007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210642077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105321035 + 105321036.

It is an arithmetic number, because the mean of its divisors is an integer number (105321036).

Almost surely, 2^210642071 is an apocalyptic number.

210642071 is a deficient number, since it is larger than the sum of its proper divisors (1).

210642071 is an equidigital number, since it uses as much as digits as its factorization.

210642071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 210642071 is about 14513.5133926972. The cubic root of 210642071 is about 594.9973598734.

Adding to 210642071 its reverse (170246012), we get a palindrome (380888083).

The spelling of 210642071 in words is "two hundred ten million, six hundred forty-two thousand, seventy-one".