1216264 has 32 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 506304.

The previous prime is 1216249. The next prime is 1216273. The reversal of 1216264 is 4626121.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^1216264 is an apocalyptic number.

1216264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340640).

1216264 is an abundant number, since it is smaller than the sum of its proper divisors (1465016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216264 is a wasteful number, since it uses less digits than its factorization.

1216264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 633 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1216264 is about 1102.8435972521. The cubic root of 1216264 is about 106.7437897105.

The spelling of 1216264 in words is "one million, two hundred sixteen thousand, two hundred sixty-four".