1285898 has 8 divisors (see below), whose sum is σ = 1981092. Its totient is φ = 625536.

The previous prime is 1285891. The next prime is 1285903. The reversal of 1285898 is 8985821.

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 2209 = 1133^2 + 47^2 .

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1285891) 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 3 ways as a sum of consecutive naturals, for example, 8615 + ... + 8762.

2^1285898 is an apocalyptic number.

1285898 is a deficient number, since it is larger than the sum of its proper divisors (695194).

1285898 is a wasteful number, since it uses less digits than its factorization.

1285898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17416.

The product of its digits is 46080, while the sum is 41.

The square root of 1285898 is about 1133.9744265194. The cubic root of 1285898 is about 108.7432162061.

The spelling of 1285898 in words is "one million, two hundred eighty-five thousand, eight hundred ninety-eight".