1042268420161 has 2 divisors, whose sum is σ = 1042268420162. Its totient is φ = 1042268420160.

The previous prime is 1042268420147. The next prime is 1042268420183. The reversal of 1042268420161 is 1610248622401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011100636225 + 31167783936 = 1005535^2 + 176544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042268420161 - 2⁷ = 1042268420033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1042268420161.

It is not a weakly prime, because it can be changed into another prime (1042268420101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521134210080 + 521134210081.

It is an arithmetic number, because the mean of its divisors is an integer number (521134210081).

Almost surely, 2^{1042268420161} is an apocalyptic number.

It is an amenable number.

1042268420161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042268420161 is an equidigital number, since it uses as much as digits as its factorization.

1042268420161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 1042268420161 in words is "one trillion, forty-two billion, two hundred sixty-eight million, four hundred twenty thousand, one hundred sixty-one".