1240430651 has 2 divisors, whose sum is σ = 1240430652. Its totient is φ = 1240430650.

The previous prime is 1240430593. The next prime is 1240430657. The reversal of 1240430651 is 1560340421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240430651 - 2³⁰ = 166688827 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240430651.

It is not a weakly prime, because it can be changed into another prime (1240430657) 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, 620215325 + 620215326.

It is an arithmetic number, because the mean of its divisors is an integer number (620215326).

Almost surely, 2^1240430651 is an apocalyptic number.

1240430651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240430651 is an equidigital number, since it uses as much as digits as its factorization.

1240430651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1240430651 is about 35219.7480257880. The cubic root of 1240430651 is about 1074.4614287264.

The spelling of 1240430651 in words is "one billion, two hundred forty million, four hundred thirty thousand, six hundred fifty-one".