1240660417 has 2 divisors, whose sum is σ = 1240660418. Its totient is φ = 1240660416.

The previous prime is 1240660409. The next prime is 1240660429. The reversal of 1240660417 is 7140660421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016589456 + 224070961 = 31884^2 + 14969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240660417 - 2³ = 1240660409 is a prime.

It is a super-2 number, since 2×1240660417² = 3078476540621227778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1240660117) 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, 620330208 + 620330209.

It is an arithmetic number, because the mean of its divisors is an integer number (620330209).

Almost surely, 2^1240660417 is an apocalyptic number.

It is an amenable number.

1240660417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240660417 is an equidigital number, since it uses as much as digits as its factorization.

1240660417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1240660417 is about 35223.0097663445. The cubic root of 1240660417 is about 1074.5277657584.

The spelling of 1240660417 in words is "one billion, two hundred forty million, six hundred sixty thousand, four hundred seventeen".