140420605 has 16 divisors (see below), whose sum is σ = 184028544. Its totient is φ = 102231360.

The previous prime is 140420591. The next prime is 140420617. The reversal of 140420605 is 506024041.

It is not a de Polignac number, because 140420605 - 2⁵ = 140420573 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 10599 + ... + 19828.

It is an arithmetic number, because the mean of its divisors is an integer number (11501784).

Almost surely, 2^140420605 is an apocalyptic number.

It is an amenable number.

140420605 is a deficient number, since it is larger than the sum of its proper divisors (43607939).

140420605 is a wasteful number, since it uses less digits than its factorization.

140420605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30516.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 140420605 is about 11849.9200419243. The cubic root of 140420605 is about 519.7688876827.

Adding to 140420605 its reverse (506024041), we get a palindrome (646444646).

The spelling of 140420605 in words is "one hundred forty million, four hundred twenty thousand, six hundred five".