1242518971 has 2 divisors, whose sum is σ = 1242518972. Its totient is φ = 1242518970.

The previous prime is 1242518923. The next prime is 1242518983. The reversal of 1242518971 is 1798152421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242518971 - 2¹¹ = 1242516923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242518071) 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, 621259485 + 621259486.

It is an arithmetic number, because the mean of its divisors is an integer number (621259486).

Almost surely, 2^1242518971 is an apocalyptic number.

1242518971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242518971 is an equidigital number, since it uses as much as digits as its factorization.

1242518971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 1242518971 is about 35249.3825619684. The cubic root of 1242518971 is about 1075.0640584867.

The spelling of 1242518971 in words is "one billion, two hundred forty-two million, five hundred eighteen thousand, nine hundred seventy-one".