1240413269 has 2 divisors, whose sum is σ = 1240413270. Its totient is φ = 1240413268.

The previous prime is 1240413179. The next prime is 1240413281. The reversal of 1240413269 is 9623140421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811509169 + 428904100 = 28487^2 + 20710^2 .

It is an emirp because it is prime and its reverse (9623140421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240413269 is a prime.

It is a super-3 number, since 3×1240413269³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240413289) 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, 620206634 + 620206635.

It is an arithmetic number, because the mean of its divisors is an integer number (620206635).

Almost surely, 2^1240413269 is an apocalyptic number.

It is an amenable number.

1240413269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240413269 is an equidigital number, since it uses as much as digits as its factorization.

1240413269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1240413269 is about 35219.5012599554. The cubic root of 1240413269 is about 1074.4564099383.

The spelling of 1240413269 in words is "one billion, two hundred forty million, four hundred thirteen thousand, two hundred sixty-nine".