210742065 has 12 divisors (see below), whose sum is σ = 365286324. Its totient is φ = 112395744.

The previous prime is 210742039. The next prime is 210742067. The reversal of 210742065 is 560247012.

It can be written as a sum of positive squares in 2 ways, for example, as 144937521 + 65804544 = 12039^2 + 8112^2 .

It is not a de Polignac number, because 210742065 - 2¹¹ = 210740017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210742067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2341534 + ... + 2341623.

It is an arithmetic number, because the mean of its divisors is an integer number (30440527).

Almost surely, 2^210742065 is an apocalyptic number.

It is an amenable number.

210742065 is a deficient number, since it is larger than the sum of its proper divisors (154544259).

210742065 is a wasteful number, since it uses less digits than its factorization.

210742065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683168 (or 4683165 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 210742065 is about 14516.9578424682. The cubic root of 210742065 is about 595.0914954747.

Adding to 210742065 its reverse (560247012), we get a palindrome (770989077).

The spelling of 210742065 in words is "two hundred ten million, seven hundred forty-two thousand, sixty-five".