861299 has 2 divisors, whose sum is σ = 861300. Its totient is φ = 861298.

The previous prime is 861293. The next prime is 861317. The reversal of 861299 is 992168.

861299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861299 - 2⁸ = 861043 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (861293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430649 + 430650.

It is an arithmetic number, because the mean of its divisors is an integer number (430650).

2⁸⁶¹²⁹⁹ is an apocalyptic number.

861299 is a deficient number, since it is larger than the sum of its proper divisors (1).

861299 is an equidigital number, since it uses as much as digits as its factorization.

861299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 861299 is about 928.0619591385. The cubic root of 861299 is about 95.1447102040.

The spelling of 861299 in words is "eight hundred sixty-one thousand, two hundred ninety-nine".