1285198 has 16 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 588600.

The previous prime is 1285181. The next prime is 1285199. The reversal of 1285198 is 8915821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285199) by changing a digit.

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, 633 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2^1285198 is an apocalyptic number.

1285198 is a deficient number, since it is larger than the sum of its proper divisors (811442).

1285198 is a wasteful number, since it uses less digits than its factorization.

1285198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its digits is 5760, while the sum is 34.

The square root of 1285198 is about 1133.6657355676. The cubic root of 1285198 is about 108.7234805640.

The spelling of 1285198 in words is "one million, two hundred eighty-five thousand, one hundred ninety-eight".