1263216 has 20 divisors (see below), whose sum is σ = 3263432. Its totient is φ = 421056.

The previous prime is 1263209. The next prime is 1263239. The reversal of 1263216 is 6123621.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1263192 and 1263201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13111 + ... + 13206.

2^1263216 is an apocalyptic number.

1263216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1263216 is an abundant number, since it is smaller than the sum of its proper divisors (2000216).

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

1263216 is a wasteful number, since it uses less digits than its factorization.

1263216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328 (or 26322 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 1263216 is about 1123.9288233692. The cubic root of 1263216 is about 108.1000444706.

Adding to 1263216 its reverse (6123621), we get a palindrome (7386837).

The spelling of 1263216 in words is "one million, two hundred sixty-three thousand, two hundred sixteen".