140221441 has 2 divisors, whose sum is σ = 140221442. Its totient is φ = 140221440.

The previous prime is 140221439. The next prime is 140221447. The reversal of 140221441 is 144122041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102090816 + 38130625 = 10104^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 140221441 - 2¹ = 140221439 is a prime.

It is a super-2 number, since 2×140221441² = 39324105032232962, which contains 22 as substring.

Together with 140221439, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140221447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70110720 + 70110721.

It is an arithmetic number, because the mean of its divisors is an integer number (70110721).

Almost surely, 2^140221441 is an apocalyptic number.

It is an amenable number.

140221441 is a deficient number, since it is larger than the sum of its proper divisors (1).

140221441 is an equidigital number, since it uses as much as digits as its factorization.

140221441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 140221441 is about 11841.5134590136. The cubic root of 140221441 is about 519.5230352758.

Adding to 140221441 its reverse (144122041), we get a palindrome (284343482).

The spelling of 140221441 in words is "one hundred forty million, two hundred twenty-one thousand, four hundred forty-one".