140304321 has 12 divisors (see below), whose sum is σ = 205438948. Its totient is φ = 92254464.

The previous prime is 140304293. The next prime is 140304343. The reversal of 140304321 is 123403041.

140304321 is a `hidden beast` number, since 1 + 40 + 304 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 78854400 = 7839^2 + 8880^2 .

It is not a de Polignac number, because 140304321 - 2⁶ = 140304257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140304294 and 140304303.

It is not an unprimeable number, because it can be changed into a prime (140304371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106120 + ... + 107433.

Almost surely, 2^140304321 is an apocalyptic number.

It is an amenable number.

140304321 is a deficient number, since it is larger than the sum of its proper divisors (65134627).

140304321 is a wasteful number, since it uses less digits than its factorization.

140304321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213632 (or 213629 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 140304321 is about 11845.0124947169. The cubic root of 140304321 is about 519.6253724274.

Adding to 140304321 its reverse (123403041), we get a palindrome (263707362).

It can be divided in two parts, 140304 and 321, that added together give a square (140625 = 375²).

The spelling of 140304321 in words is "one hundred forty million, three hundred four thousand, three hundred twenty-one".