1216411 has 4 divisors (see below), whose sum is σ = 1390192. Its totient is φ = 1042632.

The previous prime is 1216393. The next prime is 1216417. The reversal of 1216411 is 1146121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1146121 = 167 ⋅6863.

It is a cyclic number.

It is not a de Polignac number, because 1216411 - 2⁵ = 1216379 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86880 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (347548).

2^1216411 is an apocalyptic number.

1216411 is a deficient number, since it is larger than the sum of its proper divisors (173781).

1216411 is an equidigital number, since it uses as much as digits as its factorization.

1216411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173780.

The product of its digits is 48, while the sum is 16.

The square root of 1216411 is about 1102.9102411348. The cubic root of 1216411 is about 106.7480899570.

The spelling of 1216411 in words is "one million, two hundred sixteen thousand, four hundred eleven".