1298566 has 4 divisors (see below), whose sum is σ = 1947852. Its totient is φ = 649282.

The previous prime is 1298551. The next prime is 1298573. The reversal of 1298566 is 6658921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324640 + ... + 324643.

It is an arithmetic number, because the mean of its divisors is an integer number (486963).

2^1298566 is an apocalyptic number.

1298566 is a deficient number, since it is larger than the sum of its proper divisors (649286).

1298566 is an equidigital number, since it uses as much as digits as its factorization.

1298566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649285.

The product of its digits is 25920, while the sum is 37.

The square root of 1298566 is about 1139.5464009859. The cubic root of 1298566 is about 109.0991438649.

The spelling of 1298566 in words is "one million, two hundred ninety-eight thousand, five hundred sixty-six".