1240018291 has 2 divisors, whose sum is σ = 1240018292. Its totient is φ = 1240018290.

The previous prime is 1240018271. The next prime is 1240018313. The reversal of 1240018291 is 1928100421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240018291 - 2¹⁷ = 1239887219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240018231) 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, 620009145 + 620009146.

It is an arithmetic number, because the mean of its divisors is an integer number (620009146).

Almost surely, 2^1240018291 is an apocalyptic number.

1240018291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240018291 is an equidigital number, since it uses as much as digits as its factorization.

1240018291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1240018291 is about 35213.8934371080. The cubic root of 1240018291 is about 1074.3423534091.

The spelling of 1240018291 in words is "one billion, two hundred forty million, eighteen thousand, two hundred ninety-one".