1240947971 has 2 divisors, whose sum is σ = 1240947972. Its totient is φ = 1240947970.

The previous prime is 1240947919. The next prime is 1240947977. The reversal of 1240947971 is 1797490421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240947971 - 2¹⁸ = 1240685827 is a prime.

It is a super-3 number, since 3×1240947971³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1240947977) 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, 620473985 + 620473986.

It is an arithmetic number, because the mean of its divisors is an integer number (620473986).

Almost surely, 2^1240947971 is an apocalyptic number.

1240947971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240947971 is an equidigital number, since it uses as much as digits as its factorization.

1240947971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1240947971 is about 35227.0914354279. The cubic root of 1240947971 is about 1074.6107755501.

The spelling of 1240947971 in words is "one billion, two hundred forty million, nine hundred forty-seven thousand, nine hundred seventy-one".