1216465 has 8 divisors (see below), whose sum is σ = 1467648. Its totient is φ = 967920.

The previous prime is 1216459. The next prime is 1216489. The reversal of 1216465 is 5646121.

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

It is not a de Polignac number, because 1216465 - 2⁵ = 1216433 is a prime.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 570 + ... + 1660.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

2^1216465 is an apocalyptic number.

It is an amenable number.

1216465 is a deficient number, since it is larger than the sum of its proper divisors (251183).

1216465 is a wasteful number, since it uses less digits than its factorization.

1216465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319.

The product of its digits is 1440, while the sum is 25.

The square root of 1216465 is about 1102.9347215497. The cubic root of 1216465 is about 106.7496695524.

It can be divided in two parts, 1216 and 465, that added together give a square (1681 = 41²).

The spelling of 1216465 in words is "one million, two hundred sixteen thousand, four hundred sixty-five".