8261641 has 2 divisors, whose sum is σ = 8261642. Its totient is φ = 8261640.

The previous prime is 8261621. The next prime is 8261647. The reversal of 8261641 is 1461628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4857616 + 3404025 = 2204^2 + 1845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8261641 is a prime.

It is not a weakly prime, because it can be changed into another prime (8261647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130820 + 4130821.

It is an arithmetic number, because the mean of its divisors is an integer number (4130821).

Almost surely, 2^8261641 is an apocalyptic number.

It is an amenable number.

8261641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261641 is an equidigital number, since it uses as much as digits as its factorization.

8261641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 8261641 is about 2874.3070469245. The cubic root of 8261641 is about 202.1569949009.

The spelling of 8261641 in words is "eight million, two hundred sixty-one thousand, six hundred forty-one".