140221447 has 2 divisors, whose sum is σ = 140221448. Its totient is φ = 140221446.

The previous prime is 140221441. The next prime is 140221489. The reversal of 140221447 is 744122041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140221447 - 2³ = 140221439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140221441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70110723 + 70110724.

It is an arithmetic number, because the mean of its divisors is an integer number (70110724).

Almost surely, 2^140221447 is an apocalyptic number.

140221447 is a deficient number, since it is larger than the sum of its proper divisors (1).

140221447 is an equidigital number, since it uses as much as digits as its factorization.

140221447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 140221447 is about 11841.5137123596. The cubic root of 140221447 is about 519.5230426859.

Adding to 140221447 its reverse (744122041), we get a palindrome (884343488).

The spelling of 140221447 in words is "one hundred forty million, two hundred twenty-one thousand, four hundred forty-seven".