1298728 has 16 divisors (see below), whose sum is σ = 2472480. Its totient is φ = 639408.

The previous prime is 1298723. The next prime is 1298747. The reversal of 1298728 is 8278921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (154530).

2^1298728 is an apocalyptic number.

It is an amenable number.

1298728 is a deficient number, since it is larger than the sum of its proper divisors (1173752).

1298728 is a wasteful number, since it uses less digits than its factorization.

1298728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2492 counting only the distinct ones).

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

The square root of 1298728 is about 1139.6174796834. The cubic root of 1298728 is about 109.1036804913.

The spelling of 1298728 in words is "one million, two hundred ninety-eight thousand, seven hundred twenty-eight".