842120971 has 2 divisors, whose sum is σ = 842120972. Its totient is φ = 842120970.

The previous prime is 842120957. The next prime is 842121001. The reversal of 842120971 is 179021248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842120971 - 2¹³ = 842112779 is a prime.

It is not a weakly prime, because it can be changed into another prime (842120911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421060485 + 421060486.

It is an arithmetic number, because the mean of its divisors is an integer number (421060486).

Almost surely, 2^842120971 is an apocalyptic number.

842120971 is a deficient number, since it is larger than the sum of its proper divisors (1).

842120971 is an equidigital number, since it uses as much as digits as its factorization.

842120971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 842120971 is about 29019.3206502151. The cubic root of 842120971 is about 944.3322629073.

It can be divided in two parts, 8421 and 20971, that added together give a palindrome (29392).

The spelling of 842120971 in words is "eight hundred forty-two million, one hundred twenty thousand, nine hundred seventy-one".