1140420217 has 2 divisors, whose sum is σ = 1140420218. Its totient is φ = 1140420216.

The previous prime is 1140420191. The next prime is 1140420233. The reversal of 1140420217 is 7120240411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 879952896 + 260467321 = 29664^2 + 16139^2 .

It is an emirp because it is prime and its reverse (7120240411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140420217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1140420817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570210108 + 570210109.

It is an arithmetic number, because the mean of its divisors is an integer number (570210109).

Almost surely, 2^1140420217 is an apocalyptic number.

It is an amenable number.

1140420217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140420217 is an equidigital number, since it uses as much as digits as its factorization.

1140420217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1140420217 is about 33770.1083356272. The cubic root of 1140420217 is about 1044.7722669424.

Adding to 1140420217 its reverse (7120240411), we get a palindrome (8260660628).

The spelling of 1140420217 in words is "one billion, one hundred forty million, four hundred twenty thousand, two hundred seventeen".