7842761 has 2 divisors, whose sum is σ = 7842762. Its totient is φ = 7842760.

The previous prime is 7842733. The next prime is 7842773. The reversal of 7842761 is 1672487.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7458361 + 384400 = 2731^2 + 620^2 .

It is an emirp because it is prime and its reverse (1672487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842761 - 2⁶ = 7842697 is a prime.

It is not a weakly prime, because it can be changed into another prime (7842061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921380 + 3921381.

It is an arithmetic number, because the mean of its divisors is an integer number (3921381).

Almost surely, 2^7842761 is an apocalyptic number.

It is an amenable number.

7842761 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842761 is an equidigital number, since it uses as much as digits as its factorization.

7842761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 7842761 is about 2800.4929923140. The cubic root of 7842761 is about 198.6809952555.

The spelling of 7842761 in words is "seven million, eight hundred forty-two thousand, seven hundred sixty-one".