1216195 has 4 divisors (see below), whose sum is σ = 1459440. Its totient is φ = 972952.

The previous prime is 1216177. The next prime is 1216213. The reversal of 1216195 is 5916121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5916121 = 1097 ⋅5393.

It is an interprime number because it is at equal distance from previous prime (1216177) and next prime (1216213).

It is a cyclic number.

It is not a de Polignac number, because 1216195 - 2⁷ = 1216067 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121615 + ... + 121624.

It is an arithmetic number, because the mean of its divisors is an integer number (364860).

2^1216195 is an apocalyptic number.

1216195 is a deficient number, since it is larger than the sum of its proper divisors (243245).

1216195 is an equidigital number, since it uses as much as digits as its factorization.

1216195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243244.

The product of its digits is 540, while the sum is 25.

The square root of 1216195 is about 1102.8123140408. The cubic root of 1216195 is about 106.7417711080.

The spelling of 1216195 in words is "one million, two hundred sixteen thousand, one hundred ninety-five".