1240442117 has 2 divisors, whose sum is σ = 1240442118. Its totient is φ = 1240442116.

The previous prime is 1240442107. The next prime is 1240442123. The reversal of 1240442117 is 7112440421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239110401 + 1331716 = 35201^2 + 1154^2 .

It is an emirp because it is prime and its reverse (7112440421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240442117 - 2¹⁰ = 1240441093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240442107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620221058 + 620221059.

It is an arithmetic number, because the mean of its divisors is an integer number (620221059).

Almost surely, 2^1240442117 is an apocalyptic number.

It is an amenable number.

1240442117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240442117 is an equidigital number, since it uses as much as digits as its factorization.

1240442117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1240442117 is about 35219.9108034078. The cubic root of 1240442117 is about 1074.4647393338.

Adding to 1240442117 its reverse (7112440421), we get a palindrome (8352882538).

The spelling of 1240442117 in words is "one billion, two hundred forty million, four hundred forty-two thousand, one hundred seventeen".