1298065 has 8 divisors (see below), whose sum is σ = 1575720. Its totient is φ = 1026432.

The previous prime is 1298057. The next prime is 1298111. The reversal of 1298065 is 5608921.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 966289 = 576^2 + 983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1298065 - 2³ = 1298057 is a prime.

1298065 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (196965).

2^1298065 is an apocalyptic number.

It is an amenable number.

1298065 is a deficient number, since it is larger than the sum of its proper divisors (277655).

1298065 is an equidigital number, since it uses as much as digits as its factorization.

1298065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1298065 is about 1139.3265554704. The cubic root of 1298065 is about 109.0851115395.

The spelling of 1298065 in words is "one million, two hundred ninety-eight thousand, sixty-five".