1216198 has 4 divisors (see below), whose sum is σ = 1824300. Its totient is φ = 608098.

The previous prime is 1216177. The next prime is 1216213. The reversal of 1216198 is 8916121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304048 + ... + 304051.

It is an arithmetic number, because the mean of its divisors is an integer number (456075).

2^1216198 is an apocalyptic number.

1216198 is a deficient number, since it is larger than the sum of its proper divisors (608102).

1216198 is an equidigital number, since it uses as much as digits as its factorization.

1216198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608101.

The product of its digits is 864, while the sum is 28.

The square root of 1216198 is about 1102.8136741989. The cubic root of 1216198 is about 106.7418588749.

It can be divided in two parts, 12 and 16198, that multiplied together give a triangular number (194376 = T₆₂₃).

The spelling of 1216198 in words is "one million, two hundred sixteen thousand, one hundred ninety-eight".