140510257 has 2 divisors, whose sum is σ = 140510258. Its totient is φ = 140510256.

The previous prime is 140510221. The next prime is 140510273. The reversal of 140510257 is 752015041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130782096 + 9728161 = 11436^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 140510257 - 2¹⁵ = 140477489 is a prime.

It is not a weakly prime, because it can be changed into another prime (140510857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70255128 + 70255129.

It is an arithmetic number, because the mean of its divisors is an integer number (70255129).

Almost surely, 2^140510257 is an apocalyptic number.

It is an amenable number.

140510257 is a deficient number, since it is larger than the sum of its proper divisors (1).

140510257 is an equidigital number, since it uses as much as digits as its factorization.

140510257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 140510257 is about 11853.7022486648. The cubic root of 140510257 is about 519.8794802055.

Adding to 140510257 its reverse (752015041), we get a palindrome (892525298).

The spelling of 140510257 in words is "one hundred forty million, five hundred ten thousand, two hundred fifty-seven".