7842061 has 2 divisors, whose sum is σ = 7842062. Its totient is φ = 7842060.

The previous prime is 7842059. The next prime is 7842067. The reversal of 7842061 is 1602487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4866436 + 2975625 = 2206^2 + 1725^2 .

It is an emirp because it is prime and its reverse (1602487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842061 - 2¹ = 7842059 is a prime.

It is a super-2 number, since 2×7842061² = 122995841455442, which contains 22 as substring.

Together with 7842059, it forms a pair of twin primes.

7842061 is a lucky number.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921030 + 3921031.

It is an arithmetic number, because the mean of its divisors is an integer number (3921031).

Almost surely, 2^7842061 is an apocalyptic number.

It is an amenable number.

7842061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842061 is an equidigital number, since it uses as much as digits as its factorization.

7842061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7842061 is about 2800.3680115299. The cubic root of 7842061 is about 198.6750840365.

The spelling of 7842061 in words is "seven million, eight hundred forty-two thousand, sixty-one".