140305405 has 32 divisors (see below), whose sum is σ = 186566400. Its totient is φ = 100818432.

The previous prime is 140305397. The next prime is 140305427. The reversal of 140305405 is 504503041.

It is a cyclic number.

It is not a de Polignac number, because 140305405 - 2³ = 140305397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342841 + ... + 343249.

It is an arithmetic number, because the mean of its divisors is an integer number (5830200).

Almost surely, 2^140305405 is an apocalyptic number.

It is an amenable number.

140305405 is a deficient number, since it is larger than the sum of its proper divisors (46260995).

140305405 is a wasteful number, since it uses less digits than its factorization.

140305405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 140305405 is about 11845.0582522839. The cubic root of 140305405 is about 519.6267106434.

Adding to 140305405 its reverse (504503041), we get a palindrome (644808446).

The spelling of 140305405 in words is "one hundred forty million, three hundred five thousand, four hundred five".