1240604317 has 2 divisors, whose sum is σ = 1240604318. Its totient is φ = 1240604316.

The previous prime is 1240604263. The next prime is 1240604327. The reversal of 1240604317 is 7134060421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218079801 + 22524516 = 34901^2 + 4746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240604317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240604327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620302158 + 620302159.

It is an arithmetic number, because the mean of its divisors is an integer number (620302159).

Almost surely, 2^1240604317 is an apocalyptic number.

It is an amenable number.

1240604317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240604317 is an equidigital number, since it uses as much as digits as its factorization.

1240604317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1240604317 is about 35222.2134029081. The cubic root of 1240604317 is about 1074.5115695682.

Adding to 1240604317 its reverse (7134060421), we get a palindrome (8374664738).

The spelling of 1240604317 in words is "one billion, two hundred forty million, six hundred four thousand, three hundred seventeen".