1298278 has 8 divisors (see below), whose sum is σ = 1952568. Its totient is φ = 647424.

The previous prime is 1298261. The next prime is 1298279. The reversal of 1298278 is 8728921.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (244071).

2^1298278 is an apocalyptic number.

1298278 is a deficient number, since it is larger than the sum of its proper divisors (654290).

1298278 is a wasteful number, since it uses less digits than its factorization.

1298278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

The product of its digits is 16128, while the sum is 37.

The square root of 1298278 is about 1139.4200279089. The cubic root of 1298278 is about 109.0910778196.

The spelling of 1298278 in words is "one million, two hundred ninety-eight thousand, two hundred seventy-eight".