140660221 has 6 divisors (see below), whose sum is σ = 152312730. Its totient is φ = 129840048.

The previous prime is 140660213. The next prime is 140660239. The reversal of 140660221 is 122066041.

It can be written as a sum of positive squares in 3 ways, for example, as 8732025 + 131928196 = 2955^2 + 11486^2 .

It is not a de Polignac number, because 140660221 - 2³ = 140660213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140660192 and 140660201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140660291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415986 + ... + 416323.

It is an arithmetic number, because the mean of its divisors is an integer number (25385455).

Almost surely, 2^140660221 is an apocalyptic number.

It is an amenable number.

140660221 is a deficient number, since it is larger than the sum of its proper divisors (11652509).

140660221 is an equidigital number, since it uses as much as digits as its factorization.

140660221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832335 (or 832322 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 140660221 is about 11860.0261804096. The cubic root of 140660221 is about 520.0643670321.

The spelling of 140660221 in words is "one hundred forty million, six hundred sixty thousand, two hundred twenty-one".