140512321 has 2 divisors, whose sum is σ = 140512322. Its totient is φ = 140512320.

The previous prime is 140512283. The next prime is 140512349. The reversal of 140512321 is 123215041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115261696 + 25250625 = 10736^2 + 5025^2 .

It is an emirp because it is prime and its reverse (123215041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140512321 - 2¹¹ = 140510273 is a prime.

It is not a weakly prime, because it can be changed into another prime (140512121) 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, 70256160 + 70256161.

It is an arithmetic number, because the mean of its divisors is an integer number (70256161).

Almost surely, 2^140512321 is an apocalyptic number.

It is an amenable number.

140512321 is a deficient number, since it is larger than the sum of its proper divisors (1).

140512321 is an equidigital number, since it uses as much as digits as its factorization.

140512321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 140512321 is about 11853.7893097524. The cubic root of 140512321 is about 519.8820257516.

Adding to 140512321 its reverse (123215041), we get a palindrome (263727362).

The spelling of 140512321 in words is "one hundred forty million, five hundred twelve thousand, three hundred twenty-one".