1216369 has 8 divisors (see below), whose sum is σ = 1516608. Its totient is φ = 947760.

The previous prime is 1216351. The next prime is 1216373. The reversal of 1216369 is 9636121.

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

It is not a de Polignac number, because 1216369 - 2⁵ = 1216337 is a prime.

It is a super-2 number, since 2×1216369² = 2959107088322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216339) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 7822 + ... + 7975.

It is an arithmetic number, because the mean of its divisors is an integer number (189576).

2^1216369 is an apocalyptic number.

It is an amenable number.

1216369 is a deficient number, since it is larger than the sum of its proper divisors (300239).

1216369 is a wasteful number, since it uses less digits than its factorization.

1216369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15815.

The product of its digits is 1944, while the sum is 28.

The square root of 1216369 is about 1102.8912004364. The cubic root of 1216369 is about 106.7468613505.

The spelling of 1216369 in words is "one million, two hundred sixteen thousand, three hundred sixty-nine".