140221 has 2 divisors, whose sum is σ = 140222. Its totient is φ = 140220.

The previous prime is 140207. The next prime is 140227. The reversal of 140221 is 122041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 34596 = 325^2 + 186^2 .

It is an emirp because it is prime and its reverse (122041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140221 - 2⁹ = 139709 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 140198 and 140207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70110 + 70111.

It is an arithmetic number, because the mean of its divisors is an integer number (70111).

2¹⁴⁰²²¹ is an apocalyptic number.

It is an amenable number.

140221 is a deficient number, since it is larger than the sum of its proper divisors (1).

140221 is an equidigital number, since it uses as much as digits as its factorization.

140221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 140221 is about 374.4609458942. The cubic root of 140221 is about 51.9522490638.

Adding to 140221 its reverse (122041), we get a palindrome (262262).

It can be divided in two parts, 140 and 221, that added together give a square (361 = 19²).

The spelling of 140221 in words is "one hundred forty thousand, two hundred twenty-one", and thus it is an iban number.