140221605 has 16 divisors (see below), whose sum is σ = 225598464. Its totient is φ = 74370240.

The previous prime is 140221597. The next prime is 140221621. The reversal of 140221605 is 506122041.

140221605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140221605 - 2³ = 140221597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23109 + ... + 28538.

It is an arithmetic number, because the mean of its divisors is an integer number (14099904).

Almost surely, 2^140221605 is an apocalyptic number.

140221605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140221605 is a deficient number, since it is larger than the sum of its proper divisors (85376859).

140221605 is a wasteful number, since it uses less digits than its factorization.

140221605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51836.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 140221605 is about 11841.5203838021. The cubic root of 140221605 is about 519.5232378168.

Adding to 140221605 its reverse (506122041), we get a palindrome (646343646).

The spelling of 140221605 in words is "one hundred forty million, two hundred twenty-one thousand, six hundred five".