8642761 has 2 divisors, whose sum is σ = 8642762. Its totient is φ = 8642760.

The previous prime is 8642747. The next prime is 8642773. The reversal of 8642761 is 1672468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5089536 + 3553225 = 2256^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 8642761 - 2⁷ = 8642633 is a prime.

It is not a weakly prime, because it can be changed into another prime (8642861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321380 + 4321381.

It is an arithmetic number, because the mean of its divisors is an integer number (4321381).

Almost surely, 2^8642761 is an apocalyptic number.

It is an amenable number.

8642761 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642761 is an equidigital number, since it uses as much as digits as its factorization.

8642761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 8642761 is about 2939.8573094625. The cubic root of 8642761 is about 205.2189688826.

The spelling of 8642761 in words is "eight million, six hundred forty-two thousand, seven hundred sixty-one".