140304421 has 2 divisors, whose sum is σ = 140304422. Its totient is φ = 140304420.

The previous prime is 140304403. The next prime is 140304431. The reversal of 140304421 is 124403041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 1653796 = 11775^2 + 1286^2 .

It is a cyclic number.

It is not a de Polignac number, because 140304421 - 2⁷ = 140304293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140304431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70152210 + 70152211.

It is an arithmetic number, because the mean of its divisors is an integer number (70152211).

Almost surely, 2^140304421 is an apocalyptic number.

It is an amenable number.

140304421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140304421 is an equidigital number, since it uses as much as digits as its factorization.

140304421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140304421 is about 11845.0167159021. The cubic root of 140304421 is about 519.6254958793.

Adding to 140304421 its reverse (124403041), we get a palindrome (264707462).

The spelling of 140304421 in words is "one hundred forty million, three hundred four thousand, four hundred twenty-one".