7942861 has 2 divisors, whose sum is σ = 7942862. Its totient is φ = 7942860.

The previous prime is 7942829. The next prime is 7942867. The reversal of 7942861 is 1682497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 352836 = 2755^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 7942861 - 2⁵ = 7942829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7942861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7942867) 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, 3971430 + 3971431.

It is an arithmetic number, because the mean of its divisors is an integer number (3971431).

Almost surely, 2^7942861 is an apocalyptic number.

It is an amenable number.

7942861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7942861 is an equidigital number, since it uses as much as digits as its factorization.

7942861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 7942861 is about 2818.3081804515. The cubic root of 7942861 is about 199.5227035131.

It can be divided in two parts, 794 and 2861, that added together give a triangular number (3655 = T₈₅).

The spelling of 7942861 in words is "seven million, nine hundred forty-two thousand, eight hundred sixty-one".