1304216 has 8 divisors (see below), whose sum is σ = 2445420. Its totient is φ = 652104.

The previous prime is 1304209. The next prime is 1304221. The reversal of 1304216 is 6124031.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1304216³ = 6655333548289049088, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1304194 and 1304203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81506 + ... + 81521.

2^1304216 is an apocalyptic number.

It is an amenable number.

1304216 is a deficient number, since it is larger than the sum of its proper divisors (1141204).

1304216 is a wasteful number, since it uses less digits than its factorization.

1304216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163033 (or 163029 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1304216 is about 1142.0227668484. The cubic root of 1304216 is about 109.2571433625.

Adding to 1304216 its reverse (6124031), we get a palindrome (7428247).

The spelling of 1304216 in words is "one million, three hundred four thousand, two hundred sixteen".