842540107 has 2 divisors, whose sum is σ = 842540108. Its totient is φ = 842540106.

The previous prime is 842540087. The next prime is 842540129. The reversal of 842540107 is 701045248.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842540107 is a prime.

It is not a weakly prime, because it can be changed into another prime (842540137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421270053 + 421270054.

It is an arithmetic number, because the mean of its divisors is an integer number (421270054).

Almost surely, 2^842540107 is an apocalyptic number.

842540107 is a deficient number, since it is larger than the sum of its proper divisors (1).

842540107 is an equidigital number, since it uses as much as digits as its factorization.

842540107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 842540107 is about 29026.5414233250. The cubic root of 842540107 is about 944.4889062769.

The spelling of 842540107 in words is "eight hundred forty-two million, five hundred forty thousand, one hundred seven".