1240305413 has 2 divisors, whose sum is σ = 1240305414. Its totient is φ = 1240305412.

The previous prime is 1240305377. The next prime is 1240305421. The reversal of 1240305413 is 3145030421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209857089 + 30448324 = 34783^2 + 5518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240305413 - 2¹⁸ = 1240043269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240305433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620152706 + 620152707.

It is an arithmetic number, because the mean of its divisors is an integer number (620152707).

Almost surely, 2^1240305413 is an apocalyptic number.

It is an amenable number.

1240305413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240305413 is an equidigital number, since it uses as much as digits as its factorization.

1240305413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1240305413 is about 35217.9700295176. The cubic root of 1240305413 is about 1074.4252671108.

Adding to 1240305413 its reverse (3145030421), we get a palindrome (4385335834).

The spelling of 1240305413 in words is "one billion, two hundred forty million, three hundred five thousand, four hundred thirteen".