842126069 has 2 divisors, whose sum is σ = 842126070. Its totient is φ = 842126068.

The previous prime is 842126053. The next prime is 842126081. The reversal of 842126069 is 960621248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 785680900 + 56445169 = 28030^2 + 7513^2 .

It is a cyclic number.

It is not a de Polignac number, because 842126069 - 2⁴ = 842126053 is a prime.

It is a super-2 number, since 2×842126069² = 1418352632178785522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_43198841 and since 842126069 and 43198841 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842126009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421063034 + 421063035.

It is an arithmetic number, because the mean of its divisors is an integer number (421063035).

Almost surely, 2^842126069 is an apocalyptic number.

It is an amenable number.

842126069 is a deficient number, since it is larger than the sum of its proper divisors (1).

842126069 is an equidigital number, since it uses as much as digits as its factorization.

842126069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 842126069 is about 29019.4084881136. The cubic root of 842126069 is about 944.3341684910.

The spelling of 842126069 in words is "eight hundred forty-two million, one hundred twenty-six thousand, sixty-nine".