842157264281 has 2 divisors, whose sum is σ = 842157264282. Its totient is φ = 842157264280.

The previous prime is 842157264233. The next prime is 842157264293. The reversal of 842157264281 is 182462751248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 768436326025 + 73720938256 = 876605^2 + 271516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842157264281 is a prime.

It is a super-2 number, since 2×842157264281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (842159264281) 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, 421078632140 + 421078632141.

It is an arithmetic number, because the mean of its divisors is an integer number (421078632141).

Almost surely, 2^842157264281 is an apocalyptic number.

It is an amenable number.

842157264281 is a deficient number, since it is larger than the sum of its proper divisors (1).

842157264281 is an equidigital number, since it uses as much as digits as its factorization.

842157264281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1720320, while the sum is 50.

The spelling of 842157264281 in words is "eight hundred forty-two billion, one hundred fifty-seven million, two hundred sixty-four thousand, two hundred eighty-one".