7842047 has 2 divisors, whose sum is σ = 7842048. Its totient is φ = 7842046.

The previous prime is 7842031. The next prime is 7842059. The reversal of 7842047 is 7402487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7842047 - 2⁴ = 7842031 is a prime.

It is a super-2 number, since 2×7842047² = 122995402300418, which contains 22 as substring.

It is a Chen prime.

It is equal to p₅₂₉₈₁₇ and since 7842047 and 529817 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 (7842067) 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, 3921023 + 3921024.

It is an arithmetic number, because the mean of its divisors is an integer number (3921024).

Almost surely, 2^7842047 is an apocalyptic number.

7842047 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842047 is an equidigital number, since it uses as much as digits as its factorization.

7842047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 7842047 is about 2800.3655118573. The cubic root of 7842047 is about 198.6749658085.

The spelling of 7842047 in words is "seven million, eight hundred forty-two thousand, forty-seven".