1242408247061 has 2 divisors, whose sum is σ = 1242408247062. Its totient is φ = 1242408247060.

The previous prime is 1242408247051. The next prime is 1242408247109. The reversal of 1242408247061 is 1607428042421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751576294225 + 490831952836 = 866935^2 + 700594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242408247061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242408247051) 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, 621204123530 + 621204123531.

It is an arithmetic number, because the mean of its divisors is an integer number (621204123531).

Almost surely, 2^{1242408247061} is an apocalyptic number.

It is an amenable number.

1242408247061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242408247061 is an equidigital number, since it uses as much as digits as its factorization.

1242408247061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 1242408247061 in words is "one trillion, two hundred forty-two billion, four hundred eight million, two hundred forty-seven thousand, sixty-one".