1240920907 has 2 divisors, whose sum is σ = 1240920908. Its totient is φ = 1240920906.

The previous prime is 1240920893. The next prime is 1240921013. The reversal of 1240920907 is 7090290421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240920907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240920007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620460453 + 620460454.

It is an arithmetic number, because the mean of its divisors is an integer number (620460454).

Almost surely, 2^1240920907 is an apocalyptic number.

1240920907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240920907 is an equidigital number, since it uses as much as digits as its factorization.

1240920907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1240920907 is about 35226.7072971630. The cubic root of 1240920907 is about 1074.6029633834.

The spelling of 1240920907 in words is "one billion, two hundred forty million, nine hundred twenty thousand, nine hundred seven".