140544641 has 2 divisors, whose sum is σ = 140544642. Its totient is φ = 140544640.

The previous prime is 140544629. The next prime is 140544659. The reversal of 140544641 is 146445041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122567041 + 17977600 = 11071^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 140544641 - 2¹⁰ = 140543617 is a prime.

It is a super-2 number, since 2×140544641² = 39505592227637762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140549641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70272320 + 70272321.

It is an arithmetic number, because the mean of its divisors is an integer number (70272321).

Almost surely, 2^140544641 is an apocalyptic number.

It is an amenable number.

140544641 is a deficient number, since it is larger than the sum of its proper divisors (1).

140544641 is an equidigital number, since it uses as much as digits as its factorization.

140544641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 140544641 is about 11855.1525085087. The cubic root of 140544641 is about 519.9218829893.

Adding to 140544641 its reverse (146445041), we get a palindrome (286989682).

The spelling of 140544641 in words is "one hundred forty million, five hundred forty-four thousand, six hundred forty-one".