1216898 has 8 divisors (see below), whose sum is σ = 1888380. Its totient is φ = 587440.

The previous prime is 1216879. The next prime is 1216903. The reversal of 1216898 is 8986121.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 289 = 1103^2 + 17^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10433 + ... + 10548.

2^1216898 is an apocalyptic number.

1216898 is a deficient number, since it is larger than the sum of its proper divisors (671482).

1216898 is a wasteful number, since it uses less digits than its factorization.

1216898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21012.

The product of its digits is 6912, while the sum is 35.

The square root of 1216898 is about 1103.1309985673. The cubic root of 1216898 is about 106.7623338772.

It can be divided in two parts, 12168 and 98, that multiplied together give a square (1192464 = 1092²).

The spelling of 1216898 in words is "one million, two hundred sixteen thousand, eight hundred ninety-eight".