140234557 has 2 divisors, whose sum is σ = 140234558. Its totient is φ = 140234556.

The previous prime is 140234539. The next prime is 140234569. The reversal of 140234557 is 755432041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111386916 + 28847641 = 10554^2 + 5371^2 .

It is a cyclic number.

It is not a de Polignac number, because 140234557 - 2¹⁹ = 139710269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140234537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70117278 + 70117279.

It is an arithmetic number, because the mean of its divisors is an integer number (70117279).

Almost surely, 2^140234557 is an apocalyptic number.

It is an amenable number.

140234557 is a deficient number, since it is larger than the sum of its proper divisors (1).

140234557 is an equidigital number, since it uses as much as digits as its factorization.

140234557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 140234557 is about 11842.0672604069. The cubic root of 140234557 is about 519.5392331118.

Adding to 140234557 its reverse (755432041), we get a palindrome (895666598).

The spelling of 140234557 in words is "one hundred forty million, two hundred thirty-four thousand, five hundred fifty-seven".