1240288667 has 2 divisors, whose sum is σ = 1240288668. Its totient is φ = 1240288666.

The previous prime is 1240288607. The next prime is 1240288711. The reversal of 1240288667 is 7668820421.

It is an a-pointer prime, because the next prime (1240288711) can be obtained adding 1240288667 to its sum of digits (44).

It is a strong prime.

It is an emirp because it is prime and its reverse (7668820421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240288667 - 2¹² = 1240284571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240288607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620144333 + 620144334.

It is an arithmetic number, because the mean of its divisors is an integer number (620144334).

Almost surely, 2^1240288667 is an apocalyptic number.

1240288667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240288667 is an equidigital number, since it uses as much as digits as its factorization.

1240288667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 1240288667 is about 35217.7322807702. The cubic root of 1240288667 is about 1074.4204316333.

The spelling of 1240288667 in words is "one billion, two hundred forty million, two hundred eighty-eight thousand, six hundred sixty-seven".