140606321 has 2 divisors, whose sum is σ = 140606322. Its totient is φ = 140606320.

The previous prime is 140606311. The next prime is 140606339. The reversal of 140606321 is 123606041.

It is a happy number.

140606321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 35236096 = 10265^2 + 5936^2 .

It is a cyclic number.

It is not a de Polignac number, because 140606321 - 2¹⁴ = 140589937 is a prime.

It is not a weakly prime, because it can be changed into another prime (140606311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70303160 + 70303161.

It is an arithmetic number, because the mean of its divisors is an integer number (70303161).

Almost surely, 2^140606321 is an apocalyptic number.

It is an amenable number.

140606321 is a deficient number, since it is larger than the sum of its proper divisors (1).

140606321 is an equidigital number, since it uses as much as digits as its factorization.

140606321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 140606321 is about 11857.7536236844. The cubic root of 140606321 is about 519.9979302186.

The spelling of 140606321 in words is "one hundred forty million, six hundred six thousand, three hundred twenty-one".