140030281 has 2 divisors, whose sum is σ = 140030282. Its totient is φ = 140030280.

The previous prime is 140030273. The next prime is 140030291. The reversal of 140030281 is 182030041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92544400 + 47485881 = 9620^2 + 6891^2 .

It is an emirp because it is prime and its reverse (182030041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140030281 - 2³ = 140030273 is a prime.

It is a super-2 number, since 2×140030281² = 39216959193877922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140030221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70015140 + 70015141.

It is an arithmetic number, because the mean of its divisors is an integer number (70015141).

Almost surely, 2^140030281 is an apocalyptic number.

It is an amenable number.

140030281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140030281 is an equidigital number, since it uses as much as digits as its factorization.

140030281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 140030281 is about 11833.4391028137. The cubic root of 140030281 is about 519.2868441325.

The spelling of 140030281 in words is "one hundred forty million, thirty thousand, two hundred eighty-one".