140326421 has 2 divisors, whose sum is σ = 140326422. Its totient is φ = 140326420.

The previous prime is 140326411. The next prime is 140326441. The reversal of 140326421 is 124623041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116424100 + 23902321 = 10790^2 + 4889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140326421 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140326411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70163210 + 70163211.

It is an arithmetic number, because the mean of its divisors is an integer number (70163211).

Almost surely, 2^140326421 is an apocalyptic number.

It is an amenable number.

140326421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140326421 is an equidigital number, since it uses as much as digits as its factorization.

140326421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140326421 is about 11845.9453400731. The cubic root of 140326421 is about 519.6526538819.

Adding to 140326421 its reverse (124623041), we get a palindrome (264949462).

The spelling of 140326421 in words is "one hundred forty million, three hundred twenty-six thousand, four hundred twenty-one".