1216859 has 8 divisors (see below), whose sum is σ = 1402368. Its totient is φ = 1034280.

The previous prime is 1216849. The next prime is 1216867. The reversal of 1216859 is 9586121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216859 - 2⁸ = 1216603 is a prime.

It is a super-3 number, since 3×1216859³ = 5405576654807183337, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (175296).

2^1216859 is an apocalyptic number.

1216859 is a deficient number, since it is larger than the sum of its proper divisors (185509).

1216859 is a wasteful number, since it uses less digits than its factorization.

1216859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its digits is 4320, while the sum is 32.

The square root of 1216859 is about 1103.1133214679. The cubic root of 1216859 is about 106.7611933336.

The spelling of 1216859 in words is "one million, two hundred sixteen thousand, eight hundred fifty-nine".