140534321 has 2 divisors, whose sum is σ = 140534322. Its totient is φ = 140534320.

The previous prime is 140534297. The next prime is 140534327. The reversal of 140534321 is 123435041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101284096 + 39250225 = 10064^2 + 6265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140534321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140534327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70267160 + 70267161.

It is an arithmetic number, because the mean of its divisors is an integer number (70267161).

Almost surely, 2^140534321 is an apocalyptic number.

It is an amenable number.

140534321 is a deficient number, since it is larger than the sum of its proper divisors (1).

140534321 is an equidigital number, since it uses as much as digits as its factorization.

140534321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 140534321 is about 11854.7172467335. The cubic root of 140534321 is about 519.9091569612.

Adding to 140534321 its reverse (123435041), we get a palindrome (263969362).

The spelling of 140534321 in words is "one hundred forty million, five hundred thirty-four thousand, three hundred twenty-one".