1242279869641 has 2 divisors, whose sum is σ = 1242279869642. Its totient is φ = 1242279869640.

The previous prime is 1242279869629. The next prime is 1242279869647. The reversal of 1242279869641 is 1469689722421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963923385616 + 278356484025 = 981796^2 + 527595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242279869641 - 2¹⁷ = 1242279738569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242279869641.

It is not a weakly prime, because it can be changed into another prime (1242279869647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621139934820 + 621139934821.

It is an arithmetic number, because the mean of its divisors is an integer number (621139934821).

Almost surely, 2^{1242279869641} is an apocalyptic number.

It is an amenable number.

1242279869641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242279869641 is an equidigital number, since it uses as much as digits as its factorization.

1242279869641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 61.

The spelling of 1242279869641 in words is "one trillion, two hundred forty-two billion, two hundred seventy-nine million, eight hundred sixty-nine thousand, six hundred forty-one".