1240202017 has 2 divisors, whose sum is σ = 1240202018. Its totient is φ = 1240202016.

The previous prime is 1240201997. The next prime is 1240202053. The reversal of 1240202017 is 7102020421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227521296 + 12680721 = 35036^2 + 3561^2 .

It is an emirp because it is prime and its reverse (7102020421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240202017 - 2¹⁹ = 1239677729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240201985 and 1240202003.

It is not a weakly prime, because it can be changed into another prime (1240202057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620101008 + 620101009.

It is an arithmetic number, because the mean of its divisors is an integer number (620101009).

Almost surely, 2^1240202017 is an apocalyptic number.

It is an amenable number.

1240202017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240202017 is an equidigital number, since it uses as much as digits as its factorization.

1240202017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1240202017 is about 35216.5020551445. The cubic root of 1240202017 is about 1074.3954103887.

Adding to 1240202017 its reverse (7102020421), we get a palindrome (8342222438).

The spelling of 1240202017 in words is "one billion, two hundred forty million, two hundred two thousand, seventeen".