140605321 has 2 divisors, whose sum is σ = 140605322. Its totient is φ = 140605320.

The previous prime is 140605307. The next prime is 140605327. The reversal of 140605321 is 123506041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83814025 + 56791296 = 9155^2 + 7536^2 .

It is a cyclic number.

It is not a de Polignac number, because 140605321 - 2²¹ = 138508169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140605292 and 140605301.

It is not a weakly prime, because it can be changed into another prime (140605327) 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, 70302660 + 70302661.

It is an arithmetic number, because the mean of its divisors is an integer number (70302661).

Almost surely, 2^140605321 is an apocalyptic number.

It is an amenable number.

140605321 is a deficient number, since it is larger than the sum of its proper divisors (1).

140605321 is an equidigital number, since it uses as much as digits as its factorization.

140605321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 140605321 is about 11857.7114571067. The cubic root of 140605321 is about 519.9966974642.

Adding to 140605321 its product of nonzero digits (720), we get a palindrome (140606041).

The spelling of 140605321 in words is "one hundred forty million, six hundred five thousand, three hundred twenty-one".