140128741 has 2 divisors, whose sum is σ = 140128742. Its totient is φ = 140128740.

The previous prime is 140128733. The next prime is 140128753. The reversal of 140128741 is 147821041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 298116 = 11825^2 + 546^2 .

It is a cyclic number.

It is not a de Polignac number, because 140128741 - 2³ = 140128733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140108741) 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, 70064370 + 70064371.

It is an arithmetic number, because the mean of its divisors is an integer number (70064371).

Almost surely, 2^140128741 is an apocalyptic number.

It is an amenable number.

140128741 is a deficient number, since it is larger than the sum of its proper divisors (1).

140128741 is an equidigital number, since it uses as much as digits as its factorization.

140128741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 140128741 is about 11837.5986162735. The cubic root of 140128741 is about 519.4085249658.

Adding to 140128741 its reverse (147821041), we get a palindrome (287949782).

It can be divided in two parts, 140 and 128741, that added together give a square (128881 = 359²).

The spelling of 140128741 in words is "one hundred forty million, one hundred twenty-eight thousand, seven hundred forty-one".